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Bontrager DuoTrap Review

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Von Collins is an accomplished triathlete and endurance cyclist, and the author of four fitness and training books: Smarter Running, Your First Triathlon Guide, Fit Foods, and 30 Rut-Busting Workouts . He has been cited as a triathlon, cycling, and fitness expert by Healthline, CNET, Forbes, Eat This, Not That and other major outlets.

The Bontrager DuoTrap is an intriguing device for cyclists, especially those who use Trek bikes.  We needed to take a look at one close-up, and share with you our thoughts.  Overall, the DuoTrap is a good, smart device to add precision to your training, as long as you are using a bike that is compatible with it.

How we Got Here

From the days of wooden rims to the modern aero age, the beauty of cycling on the road has always been its relatively few ingredients: a rider and their bike to start, company and destination optional. That simple formula contains a surprising amount of work behind the scenes, with bicycle technology and rider training the key to longer distances and higher speeds. But while even the most stealth bomber-inspired aero machines are still unmistakably bikes, technology has transformed rider training almost beyond recognition. Data collection, and the devices that enable it, have unlocked increased efficiency and gains, giving any serious rider professional-level training insights – or sometimes better.  That is where Bontrager’s DuoTrap comes in.

Speed is an obvious and critical measurement for most cyclists – for many, it’s also the ultimate objective of their training. Cadence, meaning the rate of pedaling, is another core measurement of a cyclist’s performance and riding style. Most cadence and speed sensors operate on the same principle, detecting each time a crank or wheel magnet rotates past an electronic pickup point. Early examples were clumsy, wired affairs, but still a welcome improvement in convenience over a chase car. Modern cadence sensors not only lose the wires in favor of wireless communication, they also integrate with other sensors at a single computer and screen head unit. This integration allows the simultaneous collection of data like cadence, power, heart rate and more.  The DuoTrap attempts to take it to the next level in a small, elegant piece of bolt-on gear.

The Bontrager DuoTrap

duotrap s

Owners of non-Trek bikes are left in the cold by the DuoTrap system, which is the single most important thing for a window shopper to know about this unit.  Don’t despair, non-Trek owners can still enjoy ample choice of head unit and sensor systems. Those universal options can also be used even on Trek models with DuoTrap provisions.

If other sensors can be used on a Trek anyway, it raises an important question: Should Trek owners always take advantage of DuoTrap compatibility over competitors?  The short answer is yes. Bontrager’s DuoTrap sits at the higher end of the sensor price range, and while integration alone justifies a price premium, the DuoTrap’s features are best in class.  Integration is an important factor when you start adding in precision bike parts like power meters or sensers.

Our First-Hand Experience Using the DuoTrap

We gave the DuoTrap a test for a couple weeks, in a number of different conditions.  We used it on a road bike that was ridden several times a week.  We liked what it gave us.

The first thing we appreciated about the DuoTrap was its seamless connectivity with bike computers and other devices — in our case, our preferred Garmin watch picked up the DuoTrap with no issues, and once paired, never had to be reminded to look for it.  Note that older watches might struggle to pick the DuoTrap signal up — not because of the DuoTrap, but because some of those older watches just were not built with the expectation that they would track things like bike cadence.  If you have not upgraded your fitness tracker in the last 3 years, you may want to consider an upgrade.  The use cases on the typical Garmin has exploded in the past 36 months and that pace doesn’t appear to be slowing down.

Bontrager Duotrap

The hardest part of us, quite honestly, was finding a Trek-compatible bike to use the DuoTrap on.  We have been riding bikes made by a lot of diffeent manufacturers, and to give this device a good test, we had to track down a Trek that we had had given to someone else.  This is probably the biggest downside of the DuoTrap.  Additionally, based on our riding, we would be hesitant to use it in a high-wear environment, such as on a mountain bike that is kicking up lots of rocks, or a fat bike that might be churning through deep snow and ice.

Find the DuoTrap here.

DuoTrap Alternatives

Inexpensive alternatives for speed and cadence sensors may be tempting, but can suffer a variety of shortcomings: For instance, the attractively priced Magene S3+ claims ANT+ and Bluetooth connectivity, but can only measure either speed or cadence at any given time. CatEye and Pioneer’s ANT+ speed and cadence sensors each undercut DuoTrap significantly but lack Bluetooth connectivity.

stages sensor duotrap

Stages or Garmin sensors seem a compelling value at first glance, comparing favorably in features to DuoTrap, but note that speed and cadence each require an individual sensor.  We have always liked the Stages sensors , as they stand-up well to wear and rough conditions, and have a simple design that is easy to install.  Once installed, you kind of forget about them which is exactly what you want.  If you don’t ride a Trek bike, we recommend the Stages sensors.  You can see the Stages speed sensor here , and the Stages cadence sensor here .

Even the comparatively high end Wahoo RPM or Blue SC sensors only match the DuoTrap on features without achieving the same integration. However, some users claim the Wahoo options are easier to reliably connect with third-party apps such as Zwift.  See the Wahoo RPM here on Amazon.

Overall, the Bontrager DuoTrap is well worth its price for owners of compatible bikes, with best-in-class connectivity and features even before factoring in its tidy frame integration. With the incredible refinement and performance of modern bikes, DuoTrap compatibility and other onboard technologies could even provide Trek an edge over competitors to attract new bike shoppers. With ANT+ and Bluetooth sensors now available from most every head unit and computer brand, more innovations like DuoTrap could be on the horizon. For now, Trek is an undeniable leader in cycling technology integration.  

1 thought on “Bontrager DuoTrap Review”

Can you recommend an affordable app for an Android Phone? Strava costs too much for me, and Wahoo won’t let you change the wheel size, so it’s inaccurate.

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duotrap bontrager trek

How to use duotrap bontrager bluetooth

How to use duotrap bontrager bluetooth

  • Jessie Greenfelder DVM

Bluetooth Smart Connection: Install and activate sensor. Turn on your phone's (or other compatible device) Bluetooth capability. Open the desired cycling app and follow instructions for Bluetooth Smart sensor connection.

How does DuoTrap Bluetooth work?

What is duotrap bluetooth on bikes, what does duotrap bontrager bluetooth do, does duotrap work with iphone, how do i connect my cadence sensor to my phone, what does ant+ compatible mean, how do you reset the bontrager duotrap, how do i enable duotrap, do trek bikes come with duotrap, what is bike cadence, how does cadence sensor work, can apple watch measure cycling cadence, why is my bluetooth not pairing, how do i make my bluetooth discoverable, how do i force a bluetooth device to pair.

Bontrager DuoTrap is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

As the name suggests, DuoTrap is a two-in-one sensor for both speed and cadence. Transmitting both Bluetooth and ANT+ data, the DuoTrap can interface with common ANT+ head units such as Garmin and Wahoo devices, as well as Trek's own Bontrager line.

Bontrager DuoTrap S is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

I was able to get the DuoTrap S to talk to my iPhone XS Max by pairing it first in an app called Cyclemeter. Once it is paired in Cyclemeter, it then shows up in Stava. Both Apps show the speed and cadence. It will not pair through the Bluetooth option in the iPhone settings.

Make sure you have Bluetooth turned on. Activate the Wahoo RPM Cadence by shaking it for a few seconds or if attached to your bike, spin the wheel a few times. Select "Saved Devices” icon on the top action bar. Select the plus "+” icon to add a new sensor.

ANT+ stands for interoperability which means that ANT+ products from multiple brands work together. Plus, because devices are compatible, you can always add to or update your monitoring system.

i removed the duotrap then removed the battery. to fully discharge the duotrap you can either wait about 5 minutes or you can take a paper clip and touch the main metal terminal and another metal piece. i used the paper clip and it worked. put battery back in and boom the duotrap reconnected to my garmin.

Now despite this feature being only available on Trek's higher end bikes (around $2,000+), it doesn't actually come with the bike. For that you have to order the separate $59 kit from Trek.

Cadence is fundamentally very simple: it's the number of revolutions your pedals make per minute as you ride. But you don't have to spend too long cycling to see that riders will often pedal at different rates. Watch a bunch of pros in a race and they'll seem to be pedalling really fast, particularly on a flat course.

The design of the cadence sensor The pod contains two magnet sensors to capture both speed and cadence. Each time the magnet passes the pod, it registers the rotation. The result is a sensor that works much like as a speedometer.

Many cadence sensors for bikes are designed to attach to the left-side chainstay. A magnet attached to your crank arm passes the sensor, which in turn records how many times it goes past and then sends a signal to your bike computer.

Using both iPhone and Apple Watch, you can track performance metrics like power, cadence and heart rate and will even let you stream live workout data to be displayed on smartwatch and smartphone.

For Android phones, go to Settings > System > Advanced> Reset Options > Reset Wi-fi, mobile & Bluetooth. For iOS and iPadOS device, you'll have to unpair all of your devices (go to Setting > Bluetooth, select the info icon and choose Forget This Device for each device) then restart your phone or tablet.

Turn ON click (to turn on the Bluetooth and to check if the button is working) Turn OFF click (to turn off the Bluetooth and to check if the button is working) Turn ON click (turn on the Bluetooth again) Discoverable Click (make the device's Bluetooth discoverable)

Once you've opened settings, Bluetooth, you'll want to find your speaker (there should be a list of devices you have connected previously). you want to connect, hold down the Bluetooth key at the top until it starts up, then turn it on afterwards.

Bike chain making clicking noise when pedaling (both when pedaling hard and easy)

Sportive Cyclist

How To Fit A Bontrager Duotrap Speed and Cadence Sensor

So this is a nice specific post then. If you are looking for a bit of intel on how to fit a Bontrager Duotrap Speed and Cadence sensor to a Trek road bike (OMG – THERE’S A HOLE IN THE CHAINSTAY), then you’ve come to the right place. Okay, you’ve come to a place. Okay, you’re here.

On the other hand, if you’ve come for some general road cycling entertainment, then these are not the droids you’re looking for, Move along now.

So, for the roughly 0.1% of you that own a Trek bike with a hole in one of the chain stays, here’s a guide to installing a Duotrap speed and cadence sensor. Two things: (i) it’s very easy; (ii) I took loads of photos.

And now an additional THIRD thing as I update this post. I madez a video. It is, after all, 2020, and we are stuck in our houses. So, either watch this YouTube dispatch, or continue to read and look at the pictures, your choice.

Yes, you are welcome for all the value I am giving you.

(Note: Some of the links in this post are affiliate links. It you click and buy something, I get a commission. You pay the same price.)

Step 1: Buy a Duotrap Speed and Cadence Sensor

Bad news. The sensor doesn’t come with the bike. That thing in your chainstay is just for pretend (see step 2). I’m sorry to be the one that has to break this to you.

Duotrap real and pretend

If you want one, you’ll have to shell out some cash. It costs around $60 / £40, depending on your monetary persuasion (okay, where you live…).

Here are the links:

Bontrager DuoTrap Speed/Cadence Sensor

Once the sensor arrives, you can move on to…

Important note: this post deals entirely with the Bontrager Duotrap and not the ‘Duotrap). The principles for installation are the same – you’ll just need to make sure you buy the right one that fits your particular Trek bike).

(And if you need to buy a Duotrap S, they are on Amazon here and can be found on the Trek website here ).

Step 2: Remove The ‘Faux’ Duotrap

My guess is that the Trek design cadre didn’t want to sell a bike with a fug-off great hole in one of the chainstays. Instead the bike comes with a plastic ‘thing’ that resembles a Duotap, just without all the sensory gubbins.

Bontrager Duotrap Chainstay Frame Cap

Remove that by unscrewing the little screw on the front with a small hex key (or Allen key in my language) and then easing it out of the hole towards you (update: the bolt requires a size 2.5 Hex wrench/Allen key).

Trek Domane 4.3 chain stay

It’ll come slow and steady because the hole in the chain stay that faces the wheel has a rubber collar that fits quite tightly around the little plastic arm that you’re removing.

Trek Domane duotrap hole collar

Step 3: Put The Battery In The Duotap

Hmm, this is disappointing. After using three photos in step two, I don’t seem to have a shot that shows the battery going in.

Anyhooze, it’s no great challenge. It takes a CR2032 battery, the flat round one about the size of a 10p / a quarter.

Step 4: Insert the Duotap Into the Hole In The Chain Stay

It should be pretty obvious how you insert the actual Duotrap device into the hole left by the fake one.

Install the duotrap in the chainstay

Once the one true Duotrap is successfully in place, tighten up the little screw (again with a small hex/Allen key) and it’s all ready to sense things.

Duotrap in position

Now it’s time to let the sensor see the magnet.

Step 5: Fit The Magnet To A Wheel Spoke

Like pretty much every other speed sensor, the Duotrap calculates velocity based on how many times your wheel rotates as you ride (specifically, how many times a magnet attached to one of your rear wheel spokes passes within range of its tractor beam). You need to fit said magnet to said spoke.

Some reviews suggest that the spoke magnet doesn’t come with the Duotrap when you buy it. I think (think, because I bought and fitted this thing about 5 months ago) that mine did come with the magnet.

If your one doesn’t come with a spoke magnet I wouldn’t worry too much. It’s a very small part that any bike shop should stock (and which they may well give you for free).

Duotrap speed sensor magnet

For this magnet (which I do think is the Bontrager one), you clip the two hinged sections of plastic around the spoke then tighten with a flat-headed screwdriver.

In terms of positioning, the idea is that the magnet passes as close as possible to sensor in the chainstay without actually hitting it on the way round. Prepare yourself for two photos that show essentially the same thing:

Duotrap speed sensor

In case it’s not obvious, its the cylindrical arm that protrudes through the back of the chainstay that is the sensor.

Duotrap speed sensor magnet and sensor

I was a little bit concerned whilst fitting the magnet that it wouldn’t go close enough to the sensor. The spokes on my Domane have flattened profiles rather than being cylindrical (presumably because Trek know that I want to eke every ounce of performance out of this thing). This means you can’t fit the magnet in any direction other than flush with the spoke (ie. you can’t rotate the end furthest away from the spoke towards the sensor)….

…. Which turns out to be no problem whatsoever. The sensor arm picks up the magnet in this orientation. Panic over.

Step 6: Fit The Magnet To The Pedal Crank

This is more straightforward. The magnet that attaches to the pedal crank (which helps record cadence) definitely comes with the Duotrap and you only have to judge its placement in one plane (which may or may not be the correct way to express what I mean, but you’ll get the idea from the photo).

The magnet is integrated into a glorified rubber band. You put this over the end of the pedal crank and move it down until it’s at the point where it passes the Duotrap ‘s cadence sensor on each stroke. You’ll probably have to remove your pedal since the band doesn’t stretch much larger than the circumference of a pedal crank.

Enough talking. Foto:

Duotrap cadence magnet and sensor

I think circle in the middle of the Duotrap is the cadence sensor, in which case, as you can see, my magnet doesn’t quite pass in front of it. Despite this positional faux-pas, the Duotrap doesn’t seem to have a problem sensing the magnet. All’s well that ends well.

As an aside, those two little dots to the right of the cadence sensor, before you get to the ANT+ logo, are lights. They flash (green and red I think) when the magnets on the spoke and pedal crank pass within range of the imperial probe and indicate that the Duotrap is working.

All that’s left to do is….

Step 7: Pair Your Duotrap With The Cycling Computer O’ Your Choice

My choice is now the Wahoo ELEMNT BOLT ( read my review here ), although this photo from when I first wrote this post shows my old Garmin Edge 510.

Since you might have a different device, I’m not going to say much, other than that pairing the Duotrap with the bike GPS is just as easy (or as hard) as any other decent speed and cadence sensor.

Whatever your bike GPS persuasion, I’m sure you’ll be interested to see a photo of my Duotrap making sweet ANT+ love with the Edge:

Duotrap and Garmin Edge 510

There you have it. Everything you could possibly want to know about how to fit a Bontrager Duotrap speed and cadence sensor.

If you found this post because you’re looking to buy a Duotrap , here are your buying options:

If this sort of thing (i.e. instructions for esoteric bike accessories) floats your boat, you should sign up to my mailing list to make sure you don’t miss out on future posts.

If this sort of thing doesn’t float your boat, but for some reason you’ve still read to the end of this post, you should still sign up for my mailing list because I mainly write about more interesting things (plus you’ll get my free guide to completing your first long distance sportive).

Until next time, safe cycling!

Monty - Sportive Cyclist

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29 thoughts on “How To Fit A Bontrager Duotrap Speed and Cadence Sensor”

I’ll actually read this later! 🙂

Mike Killen liked this on Facebook.

Mine came with the spoke magnet, pedal magnet and a battery. The only thing that wasn’t clear in the instructions provided was whether the battery was to be inserted face-up or face-down.

Thanks Lev for clearing that up.

This is what I’m not clear on either can someone pls advise which way it goes?

Hi Linzey, I’ll take a look and let you know. I might even do a quick video.

Hi Linzey – I did a video. Here it is: https://youtu.be/uY2Ltm3My6c . In short, as you open the battery compartment, the positive side of the battery (a CR2032) needs to face up towards you.

Sorry but with a gps Garmin who’s telling you the speed ? The GPS or the duotrap sensor ?

Hi Tony, I think (think) it’s the GPS first and then the speed sensor if you lose signal. That said, when I’m on the turbo (chance would be a fine thing) the head unit certainly knows to show the speed derived from the sensor when the GPS is showing me not moving (I don’t switch the GPS off). Maybe it just uses what appears to be the most sensible reading. Anyone else know?

Hi Tony. It’s actually the other way round, at least if you’re using a garmin sensor like the one attached to my rear hub. Because the GPS can be unreliable, especially when riding through trees etc and the signal from the wheel updates more often, the on-bike sensor is the master and the GPS is the slave. You’ll notice the difference if your wheel sensor drops out and speed updates go from quite constant to updating every second or so!

Help! 1. I have a duotrap S…2. and the dummy spot is on the inside of one of the front wheel forks… Cant figure how this will work and my trek doesnt have a dummy spot at the back wheel. The S model looks totally different than what you are showing. Any ideas? I am thinking that I bought the wrong item.

Couldn’t get mine to work….then turns out the battery that was sent with the unit was flat! Grrr! Once I had changed that, it synced up instantly. Thanks for clear instructions.

Awesome. Saved me an expensive shop visit!

Good to hear Bob 🙂

What if my cadence is not being picked up by my computer? When I start my ride it the computer indicates that is has found 2 sensors but I don’t get any cadence reading?

Hi I am having problems with my node 1, older I know but it should still work. I replaced both batteries and nothing is working, no lights, no cadence, no speed , just temperature. Any ideas folks?

Best description of how the Duotrap should be installed. This was so precisely written and the pictures were a perfect compliment. Thank you.

Thanks, great information!

Damn! my S won’t fit, despite the shop telling me it would. Back to the store tomorrow. Thanks for the guide

A great help to see how it is put on and put together. One thing missing in the description is the small rubber stopper(?) that goes in over the top of the little screw which holds the sensor in place. If you are taking Duotrap out after someone else fitted it (eg LBS like in my case), the screw is not visible because of the little rubber stopper, which can be removed with a finger nail or sharp implement. Just push it in when re-installing the Duotrap. Everything else you need to know is here.

Hey, thank you for the information. Much needed since I just purchased a Trek with about half the goodies….and don’t know anything about how to get it working. Much appreciated. I’m sure I’ll be asking questions once I get all the parts together and try to get them working.

No problem Phil. Hope you’re enjoying the new bike.

Have had continuing problems with the cadence sensor rubber band slipping or breaking. Finally resorted to using a zip tie around it. Suboptimal but grew tired of buying replacements.

That was a fun read! And Helpful too.

Mike – you have gone straight to the top of my Best Email Address 2021 leaderboard.

Straightforward and Concise , thans.

Will the duo trap s sensor work with a iPhone app?

I have the original Duotrap (which was ANT+ only) but I can see that the Duotrap S is both Bluetooth Smart and ANT+. iPhones can connect to Bluetooth Smart sensors, so it should work with iPhones (unless there is some esoteric reason why not, which I’d estimate at a 0.00000001% chance).

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Bontrager Duotrap S Digital Sensor

Bontrager Duotrap S Digital Sensor

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Get speed and cadence wirelessly with the Bontrager Duotrap S Digital Sensor.

Everything is included to go straight out of the box thanks to the included Bontrager wheel magnet, crank cadence band and CR2032 battery.

Trek Duotrap S Digital Sensor

Speed and cadence are two of the most important and interesting metrics for all cyclists, so if you are riding a compatible Trek why not get them wirelessly with this Bontrager Duotrap S Digital Sensor . With ANT+ and Bluetooth connectivity, this sensor is easily connected to any device featuring these, such as your cycle computer or mobile phone.

Everything is ready to go and easy to set up thanks to the included Bontrager wheel magnet, crank cadence band and CR2032 battery. Please check your bike is Duotrap compatible.

  • Wireless digital speed and cadence sensor
  • Uses CR2032 batteries
  • Includes: Bontrager wheel magnet, crank cadence band, and CR2032 battery

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A look at the Trek/Bontrager frame integrated DuoTrap ANT+ Speed/Cadence Sensor

A few weeks ago The Girl brought home her new bike , the Trek Speed Concept, which is one of the very few bikes out there that includes the option to add a frame-integrated ANT+ speed/cadence sensor.  The sensor kit fits into the frame itself – becoming quite aerodynamic, as well as simply just ‘out of the way’.  The goal here is having a speed/cadence sensor that just flows with the bike, allowing you to gather speed (thus distance as well) and cadence data – whether indoors or outside.

Now despite this feature being only available on Trek’s higher end bikes (around $2,000+), it doesn’t actually come with the bike.  For that you have to order the separate $59 kit from Trek .  The kit is actually made by Bontrager though, which of course makes a variety of bike-related components as well as a few ANT+ enabled products.

Upon realizing that the bike didn’t come with the kit I went ahead and ordered it – I was probably more eager to play with it myself than The Girl was.  But of course if you read here often, you probably figured as such.  After ordering it on Trek’s site, it came a few days later.  Here’s what it looks like in its package:

IMG_9003

Before we get all started – I should probably show you what’s in the bike prior to installing the above kit.  The bike by default comes with a little plastic placeholder kit.  From a distance you might assume this is the real deal, but once you get a bit closer your notice the ‘DuoTrap Ready’ wording – indicating the need to buy the actual kit.

IMG_9001

Once I was ready to install the real deal I went ahead and got the package all taken apart next to her bike.

IMG_9015

Inside the packaging was the DuoTrap frame sensor, a rubber crank magnet (pretty cool actually), and then a screw and rubber screw cover.  In theory it also comes with a small magnet for the wheel (to gather speed), but mine was missing.  No worries though, any standard wheel magnet will work – so I just used the one on the wheel from another sensor kit.  It’s only a $2 part from a bike store, so I wasn’t about to make a big deal out of trying to get the kit replaced.

And for fun – here’s what the main component looks like up close:

IMG_9019

Here’s a general size comparison to the more common GSC-10 speed/cadence sensor:

IMG_9025

And finally, here’s a comparison between the real and fake one:

IMG_9049

Once I was ready to start I needed to remove the fake plastic DuoTrap.  This involves finding the correct hex bit to fit in the tiny screw:

IMG_9031

After that’s done you simply unscrew it.  Fear not – it only takes one triathlete to unscrew it:

IMG_9036

From there you’ll notice that you can actually see through the frame.  Like a little window on the world…or rather…the wheel:

IMG_9045

This window allows you to slide the speed sensor portion of the kit through the frame, ultimately putting the magnetic sensor portion close to the wheel magnet:

IMG_9055

Once you’ve got it slid into the frame, you repeat the same screwdriver process as earlier – this time tightening instead of loosening:

IMG_9068

With that, the sensor kit is set.  We just need to add your normal spoke magnet onto the wheel.  In my case that was all already set (no tools required!), so I moved onto getting the cadence magnet on the crank. However unlike every other cadence magnet ever created on earth – this one doesn’t use zip ties.  Nope, it uses a fully integrated rubber band system.  Industrial strength rubber though – not like something that rolls up your newspaper.

IMG_9084

The only tradeoff with not using zip ties is that you’ll have to first remove your pedal though, to be able to slide it over and down the crank:

IMG_9083

Once you do that, you’ll get your mojo on and push this thing down the crank.  It’s an incredibly tight fit – so you don’t have to worry about it sliding around.  Again, only one triathlete required…though non-triathlete cyclists may need to find a friend that has arm strength.

IMG_9086

Once that’s on – reattach your pedals and you’re good to go – kit installed!

IMG_9092

The last step you’ll need to do of course is pair up your ANT+ head unit to the speed/cadence sensor.  What’s really cool here is that it uses the standard ANT+ device profile of “Speed/Cadence” – which means EVERY ANT+ cycling focused device out there supports it out of the box (as opposed to some of the newer speed-only and cadence-only ANT+ accessories).  Just a few devices off the top of my head that work without issue are:

Garmin: Edge 500 / 705 / 800 , Forerunner 305 / FR310TX / FR405 / FR410 / FR60 CycleOps: Joule Timex: Timex Global Trainer Bontrager: Node 1/Node 2 Computers Phone: Wahoo Fitness iPhone ANT+ Dongle , Android Sony Ericsson ANT+ enabled phones, Enki Fitness iPhone ANT+ Dongle, Digifit iPhone ANT+ Dongle/Case (And many more of course, these are just the most common)

Here’s what it looks like once it’s paired up (using an Edge 800 as an example) – you’ll see the sensor display connected, as well as during normal operation:

IMG_9073

Then you simply bike like normal.  The speed/cadence information is transmitted wirelessly via ANT+ to your head unit.

IMG_9105

(Normally I’d suggest placing the display near your handlebars, and not the rear cages, but it made for an interesting picture back here.  And more importantly – The Girl was away…so I had to crank, watch and shoot all by my lonesome…on a bike small enough for a circus clown).

You’ll want to configure your wheel size on the head unit – thus allowing accurate distance and speed measurements using simple math calculations.  Also note that the unit uses a standard coin cell battery, which is replaceable just by removing the DuoTrap and unscrewing the battery compartment.

While overall the DuoTrap is indeed more expensive than the more commonplace Garmin GSC-10 sensor ( at $30 , compared to the DuoTrap at $60 ) – I feel that if you’ve got yourself such a nice bike, you might as well pay the little bit extra and have it be fully integrated.  Additionally, because there’s no adjustment arms – you don’t have to worry about the occasional never ending re-configuration issues with it moving over time.  It just works.

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Nice. I’m getting a speed concept and was wondering about that. I’m sure I’ll end up getting it because….why not?

What has the battery life been like?

I bought and installed my Duotrap in September 2014. The battery lasted until August of 2015,so approximately 11 months, and about 2300 miles.

Actually, the wheel magnet is never included in the set.

currently, TREK site says it comes with wheels magnet (might have changed?) link to bontrager.com

I just want the cadence magnet!

That’s cool. I’ve got the Garmin GSC-10 and have lost count of the number of times I swore at the thing because it had moved yet again. I’ll wait until that baby is available for affordable bikes, though!

On a completely different note I can’t quite believe you just called your wife-top-be a circus clown!!!

“You’ll want to configure your wheel size on the head unit”.. On the Garmin units I think it computes the wheel size (and hence speed) once you’ve ridden about on it for a bit with a GPS fix.. certainly I’ve never set the wheel size on my 310XT.

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It does – that’s true, though I generally recommend just simply setting it manually – as it’ll be a touch bit more accurate…and more ‘absolute’.

what did The Girl do with her old tri bike? I am also the size of a circus clown and interested in not spending my life savings on a new tri bike. Let me know if it is for sale and the details. Thanks!

First you call me a squirrel and now you’re calling me a circus clown??? Oh, you’re soooo doing wedding dance lessons now! 🙂

I have the Madone 6.2 and I love the duotrap. I bought a wheel solely for trainer use and whoops –I forgot the magnet.

are there any problems getting everything lined up say if you were using longer or shorter crank arms, or deeper wheels since the sensor is basically stuck in one location?

The story I was told is that Bontrager provides the magnet with the Node computers instead of the DuoTrap. None of the packages at the store had the magnet in them. This is completely backwards to me, but fortunately Trek/Bontrager was nice enough to mail out a black snap magnet which fits perfectly on the flat spokes of the race lite wheelset.

With regards to battery life, I haven’t had to replace mine in the 9 months I’ve had it.

With 172.5mm cranks, I have about 13/16″ of space between the pedal bolt edge and the edge of the cadence magnet band, so I don’t think there would be much of an issue. I’m not sure about the depth of the rims.

It seems that they have taken note of complaints as I’ve just purchased the kit and it includes the magnet – perhaps we are just lucky here in Australia? Thanks for the great review – am using it to attach mine.

Performance Pedal Wrench, and you bought the Duo-Trap online. Do you ever leave the house to support your local bike shop? (other then to buy the fastest tri bike out there) … Oh, PS … Trek is the ONLY bike brand that currently allows you to have integrated speed/cadence sensors that are ANT+ compatible on the market. Support your local Bike Shops! – Disclaimer: I’m not an employee of Trek or any bike shop. Just a passionate cyclist that supports their local business’s.

Hi Sara- RE: Her old bike

She’s keeping it…she loves it very much and would be sad to see it leave the family. Sorry!

Anon and others- RE: Magnet

Completely agree it’s backwards they didn’t include a magnet. Like selling an icemaker with your Microwave instead of the fridge. Thus far the Garmin GSC-10 magnet works, though getting it ‘just right’ was a PITA. I have a magnet from Wahoo that seems far stronger that might be better. Looking forward to seeing how it works long term.

Anon- RE: LBS

I actually have two pedal wrenches – one from Performance and a nicer one from an LBS. Prefer the LBS, but it took me 25 minutes for some reason to find either, so I wasn’t going to waste any more time trying to find my nice one.

The bike itself was bought from a LBS here in the DC area.

Thanks all!

Does it get in the way of the computrainer cadence sensor? I’m looking to get cadence sensors for my wife’s and my Quintanaroos, but I’m not sure where they would go not to interfere with the computrainer sensor. Thanks!

What area on the DuoTrap is the cadence magnet supposed to line up with? Through some trial and error it seems like it should go inline with either of the tiny dots that are above and to either side of the mounting screw. It seems like you line it up with either dot – but NOT centered between the dots. Anyone know for sure??

Couple things I can add

I have a Madone 6.5 and a Speedconcept 7.2. Both have duotrap.TTYe cadence sensor should line up with the large circle on the sensor. Also an FYI for anyone who was wondering about a really deep dish wheel and duotrap. I’m running a zipp 1080 rear wheel, ya have to have the magnet all the way down near the spoke nipple, but it works great, no magnet issue. Bryan

I would like to use my Garm Edge 705 with DuoTrap but is there any way to have a running odometer reading for my bike?

Within the bike settings there’s an odometer field (on the Edge 705) that you can both set an initial value and track future mileage.

I wish I had found this site before I installed mine. The spoke magnet does NOT come with the kit. You would THINK they would throw in a $2 magnet for the $60 you spend. The spoke magnet obviously lines up with the little blade. The cadence magnet LOOKS like it would line up with the big “C” on the unit (for Cadence?) but it doesn’t; that is where the battery is. I spent one ride thinking it was my Garmin not sensing. No: the magnet was over the “C” and not picking up. Move it towards the pedal until the green light flashes when it goes by. It was a pretty small area AFT of the “C”, between that and the round black area for the screw. At least on mine. The red light flashes when the spoke magnet goes by. It is now in sync with my Garmin 305. Looks very slick. I LOVE the crank magnet band. Others should follow suit. More as I use the unit.

just bought the trek speed concept, and im so glad you have a post on this because i am about to buy the duotrap stuff!

ray, do you know if the duo trap is compatible with a garmin forerunner?

Yes, fully compatible with all Garmin Forerunner and Edge devices (it uses the same ANT+ device profile as the Garmin GSC-10 – so it looks identical to it).

I have a speed concept. I’m running zipp 1080’s on the back. I had a heck of a time syncing the wheel magnet due to the depth of the rim. I had to rig something that extended the magnet laterally so it was closer to the magnet. Anyone have suggestions on a magnet that would work?

Nice writeup. For NormG, re:moving the magnet laterally. You can get rare earth magnets from many places, and just ‘stack’ an extra one on top to get closer to the frame. They are so strong, no worries about one flying off. I got some extras at Rockler Woodworking for other projects.

One other note. To get the cadence magnet to work, it’s gotta be between the “c” and the screw.

I took my to my local bike shop to get it all installed since I hadn’t read this site yet. I am really surprised at the crappy piece of plastic spoke magnet that bontrager throws in there. For a $140 computer, give me something that doesn’t look like it will fly off within 1 week. The plastic magnet didn’t even work that well, it had to be angled, like that will work. The shop tech put on a new magnet, something more industrial that sticks out a lot more and get’s read every time. I suggest finding one and picking it up, it looked similar to this: link to ebike.org.uk

FYI, it seems Giant now has a (somewhat) integrated speed/cadence sensor in some of their new 2012 frames as well, dubbed RideSense.

I have a 2012 Giant Defy Advance 1 with RideSense by Garmin. The unit came as part of the bike, no charge. I’ve had the bike since early september and now have about 1,400 miles on it. Yesterday my RideSense crapped out on me. This is not new to me. I had the standard issue Garmin GCS-10 on my previous bike and I went through 5 seners in two years and 10,000 miles.

The problem, as I have determined it, is the sensors might be modestly water resistant, but are by no means waterproof. I live about 30 mile south of Seattle, so I bike in pretty wet conditions. When I popped open the battery door there was a tiny bit of water on the battery. I’m pretty sure water got inside and shorted the cicuitry and drained the battery. I put in a new battery, but it lasted about 30 seconds before it shorted. I’ll put a drop of isopropel alchol in there and let it dry out for a day or two and see if the circuit is totally fried. If yes, I’ll put it with the CSC-10s and order a new RideSense from Garmin. If it’s not, I’ll use some clear silicon in an attempt to seal it and have another whack at it.

Giant Defy guy here. I thought you may be interested in my follow up to the broken RideSense sensor.

First, I don’t know who makes it and neither does my LBS. Second, it is, indeed, broken. Most likely because of water intrusion. My LBS (Tacoma Bike, Tacoma, WA) gladly replaced the broken one without hesitation.

I’m going to smear silcon seal all over the new one and hope for the best.

Does anyone know what size battery the duotrap uses? I think mine is getting low becuase I am not getting a reading on the speed sensor but I am getting a reading on the cadence sensor. I can’t get the magnet to even get a light to go off on the speed sensor.

Great article – thanks!

I have a 2011 Trek Madone 5.2 and am planning to install the Duotrap sensor.

I understand that Wahoo (and maybe other people) now sell a ANT+ antenna for the iPhone.

Question: is anybody using this setup with an iPhone app? If so, which one?

I’d be very interested in viewing my bike data via a Iphone-based GPS app.

I just purchased a Trek FS 7.3 WSD and M considering purchasing the duotrap S. I currently use “Map My Ride” on my iPhone and I love it. I’ve used it for about two years. It runs my phone battery pretty quickly but am told that the Duotrap S will use considerable less battery.

The Duotrap uses a 2032, which could be a CR 2032 or a DL 2032 depending on the mfg. I also had trouble with the duotrap losing pairing, and changed the battery. The problem has continued. To give more background, and address another question, I am using my Duotrap with the Wahoo iPhone bike mount, and then Cyclemeter is the iPhone app I use. If this set up works properly i highly recommend it. But, I m having problems with the pairing. that is, the setup works for a while and then the connection is lost. The last two rides the connection dropped after 7 minutes! i could not get it to pair back up. Am going to check the battery again. The biggest challenge is to figure out what is causing the problem, the duotrap or the Wahoo receiving case.

I have the Speedtrap (front fork, speed only) on my Madone 3.1 and was amazed that it worked perfectly with about a 2cm gap rather than the normal 2-3mm on most computers. It is also clicks each time the wheel passes. Am using a Bryton GPS cadence sensor on the back and a Bryton HR sensor and they work perfectly with the Node 1 computer.

I read online (here: link to store.trekbikes.com ) that Madones need the extra spacer piece. I have a 2013 Madone 3.1 which hopefully isn’t much different than yours. Did you need the spacer?

This is all really useful stuff as I am just about to purchase a speed concept 7.5. I intend on still using my road bike with my Garmin Cadence sensor. Can I use my Forerunner on both bikes or does it have to be specific to one sensor?

Yup, just create a new bike profile for the second profile and you’ll be good to go!

Great write up. I just ordered my daughter’s bike from the local Trek dealer and was wondering how the Duo Trap worked.

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Do both lights illuminate (red/green) – meaning, does the wheel magnet passing the sensor cause the light to illuminate?

In case if one decided to switch from Trek to a different brand, how feasible is it to ‘jimmy-rigging’ the duotrap to fit another bike??

Unfortunately not. Well, not without a lot of duct tape. The challenge is that it’s designed to sit in that little well, and without it, it would just be hanging around. Yes, no doubt, in a pinch you could make it work – but I’m guessing eventually it would fall off, fly into the spokes, and blow up into a million little pieces.

many thanks for the tutorial about the fitting of the duotrap, I was just wondering how it was fitted on my bike a madone 5.2 , it is an expensive kit, since I bought the node 1, then the heart band, and I am still waiting for the sensors , they are out of stock when I bought the bike.

Excellent tutorial. I just purchased the sensor and the Bontrager computer and thought that I had lost my mind when I could not find the wheel magnet. The LOCAL store did not inform me that I had to buy one which tells me that they had no idea that it was not included. I am also peaved that the unit does not include a user manual, which I found online.

Hi DC loving the posts and hope Paris is going well.

I’ve got a duotrap and using it in conjunction with a Garmin 910xt. The cadence is being recorded just fine but the speed isn’t ( link to connect.garmin.com ) and I’m only getting the one light on the duotrap.

Would you say this is faulty or would am I missing a magnet? (I have this one link to lh4.ggpht.com )

Regards, Rob

Hmm, it definitely sounds like a magnet is missing/not close enough. You did install a magnet on the wheel – right?

If so, grab a fridge magnet (or any other magnet), and swipe it past the back side (nearest the wheel) and see if you can get it to light up. If you can’t (but the front side (cadence) does), then something’s amiss. But if both sides lightup with kitchen magnet, you just need to get a bigger/stronger/better magnet for the wheel (unless it fell off – in which case you’d just need a magnet).

Joel said… What area on the DuoTrap is the cadence magnet supposed to line up with? Through some trial and error it seems like it should go inline with either of the tiny dots that are above and to either side of the mounting screw. It seems like you line it up with either dot – but NOT centered between the dots. Anyone know for sure??

March 30, 2011 2:24 PM

Rumpole said… One other note. To get the cadence magnet to work, it’s gotta be between the “c” and the screw.

September 23, 2011 9:27 PM

I appreciate Rumpole response, but am not sure… I second Joel’s question–where EXACTLY is the cadence sensor? Thank you for your time, Rainmaker!!! 🙂

i just installed my duo trap for use with my garmin 500. mine did come with a magnet, so i guess they’ve made that change.

something i didn’t see on yours was… on my frame (domane) there was a rubber stopper/plug that was placed on the inside of the frame from factory. so, in short, it was there with the ‘fake’ sensor.

when placing the actual unit in there i couldn’t get it through the hole without removing the rubber piece. is this correct?

figured it was nice to have to stop water, buildup, etc.

thanks in advance.

I just bought the Timex Ironman Global Trainer GPS watch with HR monitor and I’m having a hell of time getting it to pair with my DuoTrap. Any suggestions on getting it to pair? I get lights on the DuoTrap, but the Timex scans and then nothing. No speed. No cadence.

Just had the DuoTrap installed on my Madone. I use a Garmin Edge 500. The Garmin recognizes the Cadence Sensor, but will not display any RPM’s on the Garmin. This has been a common issue with other riders in my cycle group. Do you know if this is a battery issue with the DuoTrap or a connection issue with Garmin. Thanks, James

I know this sounds like a silly question – but did you install the magnet on the wheel?

I only ask because more often than not when I hear of Duotrap speed issues, the magnet was never installed on the spoke.

Do you know how to calibrate the speed using the timex global trainer? It always shows me traveling around 22kph when I am pretty sure I am going at high 20+kph or even 30kph. In fact, is the speed shown based on the GPS or speed sensor?

My Friend, I’m getting upset with the Bontrager NODE 1.1 display and the duotrap sensor. This is my situation: Pairing Sensors… Sensors found 2. But then…..just the distance, no speed, no cadence. And of course I’ve installed the magnet for the speed and the rubber strap on the crank for the cadence. Ideas are welcome. ? by the way, what does it mean the red/green light on the duotrap? They should be always on, just blinking or what?

After purchasing my trek the shop fitted the cadance and set up my edge as part of the service all works perfect…until I put the bike on the cycle ops trainer and realised there was no speed readout, no magnet fitted to the wheel! So I fitted one and it was perfect again, I think? How do I set the wheel size, do I need to? I am getting speeds and distance reading but how close to actual I don’t know? Great kit though and great report! Thanks guys

You’ll configure it within your Edge unit under bike profiles. Or, if you go outside, after riding about 1/3rd of a mile, it’ll pop-up and say ‘auto configured by GPS’.

Has anyone tried paring with a Garmin Oregon 450 (or any other model of Oregon gps)? What is your experience with pairing and whether it reports cdence and speed.

The Garmin Oregon 450 will only report cadence, not speed. But it will indeed pair with the Duotrap, since it’s just a GSC-10 in effect.

Detail about cadence-only: link to buy.garmin.com

RE: Garmin 305 Compatibility- Rainmaker you list that the sensor is compatible with the Forerunner 305. I don’t think the 305 is ANT+. My GSC-10 sensor is dead and I wanted to upgrade to the Duo. Are you saying that the 305 will pick up the cadence/speed via whatever non ANT+ frequency the 305 receives? This would be sleek.

The FR305 is absolutely ANT+. It won’t connect to any other sensor type besides ANT+. You can see pictures of the FR305 with the GSC-10 in that review.

Bought a Garmin Edge 510, added a Duotrap, I get speed but not cadence, peddled by hand for awhile but it didn’t pick up. I installed the crank magnet just as you show. Any suggestions?

Does the light blink when it goes around? If not, then remove the magnet and pass it right in front of the sensor. If it still doesn’t blink – then something is wrong with the sensor. If it does blink, then it’s a positioning/distance issue.

Thanks for the reply. I have the bike mounted in my trainer. When I moved the crank magnet further away from the pedal and I finally saw the green light blink, red blinks for the speed magnet. Unfortunately even with the 510 still showing me the speed cadence sensor was found, when I pedaled the bike by hand it still only registered speed, not cadence. I will continue to toy with it, hoping this isn’t just a case of operator error.

Once again, I appreciate your expertise. In the end, my problem got solved by resetting the 510, moving the crank magnet then pairing the duo trap speed cadence sensor. Then wahhlah! It works! Thanks again.

Thanks a million for providing this information on how to set it up. The instructions the duotrap came with were not very clear and you made the process simple. Thanks. I am using it on Trek Domane 4.5 and with a Bryton Rider 50.

I also have the Bontrager unit on a Trek Madone 4.5. I had used it successfully with a Garmin Forerunner 405 but recently bought a Bryton Rider50. The unit pairs with the Bontrager speed/cadence sensor and my Garmin HRM strap, but when I go out for a ride it:

1. does not record distance or speed, 2. does not record ride time.

This renders it virtually useless. I have been too and fro with the Bryton customer support but am not making any headway. Have you experienced any similar issues or had to do anything in particular to set it up?

Any help would be very much appreciated.

I am wondering of Bontrager has any near future plan to make a duotrap Bluetooth 4 compatible. Any info anybody?

I haven’t heard anything there, though eventually I’d expect to see something.

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Another vote for a duo trap Bluetooth 4 speed/cadence sensor – my Wahoo Bluetooth 4.0 speed/cadence sensor physically will not fit on my domane 4 because it’s designed for duo trap 🙁

I’m picking up my trek 5.2 C next week and planning on buying the duo trap. Just want to keep it simple and pair it with the Bontrager Node 1.1. Have there been any problems with that combo.

Will this work with the Suunto Ambit2 and have you tried it yet?

Yes, no problems with Ambit1 or Ambit2.

I’ve been running my DuoTrap without the spoke magnet and simply getting my speed readings from my Edge 500. Is this an acceptable setup or would you recommend using the spoke magnet? If so, how does the Edge know whether it should use the GPS or the spoke magnet for speed?

The Edge will use the wheel spoke for display of speed assuming the speed is greater than zero, but actual recorded speed will always come from GPS unless GPS is off.

Was ab/e to figure out how to get the sensor out and replace the battery. Thanks for the post!

Will the Duptrap work with the Garmin 610?

Yes, no problems there.

hey ray…i cannot for the life of me find which hex bit fits into the screw…no clue how i was able to screw this sucker in and now i need to change the battery and ive been through all my tools and cant find one that fits…any help?

I was hoping to be able to help ya here, but I can’t actually figure out where on earth my gigantic hex set went to. :-/

haha, thanks for checking! i am at my wits end trying to get this damn thing off. will try all the tools again tomorrow before embarassing myself by bringing it to my LBS.

Kim, the hex bit required to remove the Duo Trap is 2.5mm. I bought one of those nifty compact tool things today which folds up really small and it has hex bits down to 2.0mm. Did you get the little instruction sheet with your Duo Trap as its tells you its 2.5mm. I bought my Duo Trap today, ready for when my Edge 810 arrives tomorrow (hopefully), and have been puzzling over how to get it going for several hours. Thanks to the comments here I think I have it sussed. I can’t believe the instructions that come with it are so inadequate, it’s like we have to be detectives to work it all out. I conclude that the crank and spoke magnets can be lined up at either of the two dots that are located on the cadence and speed sensors respectively, but not at any other position. This, I think, is a way of providing two different distance settings between the magnet and sensor. My crank is on an angle relative to the Duo Trap so the magnet has a different separation from the sensor at each of the two dot positions. The instructions say that the distance has to be between 3 and 5 mm. I am a bit worried that I can’t get mine any closer than 5mm which is right on the limit. I am wondering why the distance is not closer as should the Duo Trap not be perfectly designed for my Trek Modane 4.5.? The spoke magnet is also 5mm away. Like other people I spent some time with the magnets positioned between the dots before catching on. Despite the 5mm separation it seems to be working, the LED’s flash ok. I have found that I have to wait for about 15min before the LED’s reset after they have flashed 10 times. You can still check the sensors are picking up the magnets though without the LED’s by listening for a clicking sound. My Duo Trap came with an ‘Aero Wheel Magnet’ because it is Part 426618. Part 411775 (which Ray fitting to the girls bike) does not come with a magnet. From what I can tell, this is the only difference between the two Duo Traps. My Duo Trap also came with a Sony battery. I do have one question, does the ‘aero’ in aero wheel refer to the type of wheel or does it refer to the aerodynamics of the magnet. Anyway, as people have said, it does not look all that powerful (with respect to magnet field strength) so it may be a candidate for replacement. Finally I thought it was quite funny that my instruction sheet, even though it lacks all the important detail, specified a maximum torque of 2 Nm when tightening the little hex screw. As if anyone is going to measure that. I hope this info can be of help to anyone. I am grateful for the help I have got from everyone else’s comments.

Thanks DCRainmaker – your post/comments/replies helped me fix my missing cadence issue.

For those who asked, I just found that my cadence picks up when it is over the dot to the aft of the screw. My cadence had stopped picking up b/c my magnet had slipped up my crank arm so it sat right over the duotrap securing screw (and thus between the two dots).

Incidentally, I guess my LBS wasn’t very careful during installation b/c I noticed that my rubber band has a cut running about half way across the width of the band. Here’s hoping that tear doesn’t spread. Wonder if this is why my magnet moved? Suspect I may have bumped it with my foot or something because it was working, then stopped during a ride (single leg drills with lots of clipping/unclipping). Ride on!

Great article as usual – thanks. One thing. I have a “no glue, no cable tie” crank magnet that just sticks to the end of the pedal shaft. It works great with the Garmin GSC 10 cadence sensor and is really tidy. However, I guess it won’t work with the Duo trap as the sensor can not be moved to line up with the magnet. (you have to move the magnet to line up with the sensor). Please tell me I am wrong!

Unfortunately it won’t work, you’ll need to use the included magnet (or, a different magnet that can align to the sensor).

Hi again – actually my magnet attached to pedal shaft works perfectly. The magnet is very strong, so sensor picks it up. John

Does anyone have experience with 80mm rims – where did you mount the magnet?

My training/ ride friend and me both have these gadgets installed. My friend has a duotrap, a heart rate monitor and a node 2.1, while i only have a bike that fits the speedtrap and a node 1.1. The weird thing is that when we ride together my node picks up his sensors, but his 2.1 does not seem to have that problem. And yes it is a fact! i dont have a cadence or a heart rate sensor but i still get 3 sensors and all the info when we are out riding together! is there any way to lock my node to my lonely speedtrap sensor? I really have no need to keep tabs on my friends heart rate. BTW it seems like his speed sensor wins over mine as well. If we ride together i get a speed reading together with the heart rate and cadence but if we have some distance between us i loose all sensors and have to pair my sensor to the node again to get a signal. annoying but true

After reading this page and yearning for the duo trap, I FINALLY splurged and purchased it with the Node 1.1 for my Trek Domane 4.5. After installing, only the speed sensor worked. Brought it to my LBS and they added an earth magnet to the pedal sensor and it works great! Thanks for your great reviews and website!!

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Does the Trek/Bontrager frame integrated DuoTrap ANT+ Speed/Cadence Sensor work with my new Garmin Forerunner 910XT?

Did you get an answer on the compatibility of the Garmin 910xt to the Bontrager Duo Trap. Am putting them on my new Speed Concept, P1. Just awaiting arrival of the 910 mount for the aero bar assembly, it is a specific application. I’m told that TREK and Garmin are working together on this so it should perform like a champ. Any feedback is appreciated.

Yes, it works just fine with the FR910XT. My wife has one, no issues.

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I can verify the duotrap works with the Wahoo RFLKT+. I can also confirm that the Bontrager folks don’t include a CR2032 battery with a duotrap — pretty much unlike every other device using that battery I’ve ever bought. So make sure you pick one up before you head home!

And if you Trek people are reading this, at least put a bloody sticker on the box. Either “In order to ensure freshness, please buy a CR2032 along with this sensor” or maybe just “Requires CR2032 battery, not included.”

My DuoTrap came w a battery (with pull tab to engage it). Maybe they’re packaging them differently now?

I have Trek Madone 4.5 with Bontrager DuoTrap but I have lost crank magnet. Unfortunately I can’t buy original (411776) 10mm Crank Cadence Band Magnet DuoTrap Sensor Black anywhere in Poland so here comes my question. Does anyone know if crank magnet from GSC10 (link below) will work with DualTrap + Garmin 305? link to buy.garmin.com

Thanks for help in advance! Best regards, Wiktor

Yes, it will. They’re all interchangeable.

Sorry to reply to this old report/forum – could you confirm that a normal (garmin) pedal magnet should work with the duo-trap?

Yup, it would.

Thanks for your in-depth reviews. I have a question though regarding Garmin Forerunner watches and the DuoTrap/ANT+ technology: I ride a Madone 4.5 with the DuoTrap set up, which sends the readings to my Node 1.1 speedometer that I use. I’m considering buying a FR310 (obviously ANT+ compatible), which I will also run off of the same DuoTrap ANT+ sensor (I want the Node 1.1 to be my normal “during ride” speedometer, giving me speed and cadence as I ride, but I want the FR310 to pick up the speed & cadence so that after my ride I can look at the data on Garmin-Connect, thus being able to incorporate together cadence, bike speed, heart rate, etc.)

So here is my 1st big question: **Can I run both my Bontrager Node 1.1 speedometer AND my Garmin 310XT at the same time, off of the same ANT+ sensor (my DuoTrap)?** Or will having 2 computers (speedometer and watch) picking up the same ANT+ sensor be problematic?

Hopefully this question makes sense! Thanks so much!

Yes, ANT+ sensors can multi-stream to multiple head units without issue.

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i am using the duotrap speed/cadence sensor with my garmin 810 and have no problems when i ride outside. however, when using the trainer, the garmin will only register my cadence information – not my speed or distance. my husband, who uses a garmin 810 with the garmin speed/cadence sensor is able to get cadence, speed, and distance while riding his trainer.

the garmin says that the speed/cadence sensor is detected – why am i unable to get more data?

thanks for your help!

I believe there is a setting to choose between GPS and the speed sensor as the source for speed data. Also make sure your wheel magnet is positioned correctly.

I have an Edge 200, and I question the accuracy of the distance measurements and the resulting average speed calculations. Unfortunately I am an engineer, so of course this bothers me to the nth degree. Does anybody have any idea as to a percentage accuracy (say +/- 2% for instance) for distance/avg speed measurements for an Edge 200? I spoke to a dealer about this and he told me he went to a duo trap primarily for the purpose of getting more accurate and consistent distance/avg speed figures. To do this, I would first need to upgrade to an edge 500 and then invest in the duo trap. Probably talking $250 – $300. So here’s my question: how much of an improvement in accuracy and consistency of distance/avg speed figures could I expect by going to an edge 500 + a duo trap?

GPS has jitter, but essentially zero drift. Tire speed sensors (like the duotrap) have essentially no jitter, but tons of drift.

How much drift for a tire rotation sensor? It depends on temperature (air expanding), and how accurately you measure wheel circumference.

How much jitter for GPS? Depends on the device, how nervous the DoD is that day.

I’ve been using my DuoTrap with my Node 1.1 for a few months….WHILE AT THE SAME TIME, using my phone to track GPS (Strava and MapMyRide). There is usually a small difference in distance between the two units…less than 1/10 mile…so nothing I’ve been concerned about.

Thanks for the insight Rich and Karen. Question for Karen – when you say less than 1/10 of a mile difference in distance, over what distance ride are we talking?

I’ve used it for all rides but let’s say up to 30 miles for arguments sake. My husband has a similar set up, uses the Node 1.1 but not the DuoTrap, and feels he gets more accurate distance readings with it, than with his GPS since we have some areas near our home that “blank out” on hilly rides. Does that make sense?

It most certainly does make sense. 1/10 of a mile over 30 miles is roughly 0.3%… not significant. Thanks!

Similar thing happens when I convert Garmin FR910XT file to Nike+ when I run — I lose 1/100 of a mile link to awsmithson.com –Frank

OK, so here’s my next question : If the duo trap doesn’t offer anything significant in the way of distance/speed accuracy, then the only reason that I can see to buy it would be to get cadence, because you already get speed/distance via GPS. So why not just go with the cadence accessory offered by Garmin? I’m assuming that would be less expensive ???

In my case, I’m hoping to drop the phone use and upgrade to a 800-series Garmin for regular rides…but these things take time and money :o)

However, since I also use a trainer, the Node provides all of the info I need to manually enter my workouts in the other apps.

My duotrap is pairing with my Suunto ambit 2 (bike pod) but is only giving me a readout on the ‘speed’ display but I am not getting any cadence read out… will it show on the watts display or do i have to download a different cycling app for the watch for cadence? I have tried moving the magnets but to no avail. Any help would be much appreciated.

Watts requires a power meter. There are some apps that can estimate it indoors on certain trainers (like a Kinetic trainer), however. I’d validate that the Duotrap lights are showing up for both first.

Hey there. I’m new to this and about to buy a Trek Domane 4.7 WSD.

I’m interested in the Duotrap thingy, but I have an iPhone 5 so more interested in BLE rather than ANT+….

Please may I have thoughts/comments/solutions?

Does the duotrap and a Cyclops Joule offer me a solution? What about heart rate monitors….

Confused.com… 🙂

If you use a 4iiii viiiiva, HRM strap, then it can relay any ANT+ sensor data to your iPhone along with its own HR data via its BLE connection: link to dcrainmaker.com

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Ray…I’m looking at a Trek Madone 4.3 that is DuoTrap compatible. I just wanted to see how well the device has held up for The Girl after 3 years. Has it died or had to be replaced? I’m typically apprehensive to proprietary technology due to the difficulty or inability to upgrade down the road (especially if the device is discontinued), but in this case, I really like the integrated feel of this, even if it is twice the price of the Garmin GSC-10.

Still works great for her. Obviously, had to swap out the battery once or twice, but all good. The nice part is that down the road, it’s just an ANT+ Speed/Cadence sensor from a tech standpoint. So while the shape is proprietary (all bike parts are), the underlying technology is the same as the GSC-10. To any random Garmin device, the two units look indistinguishable to each other.

That’s great to hear. I’m looking at the Trek’s specifically with this feature, so to know that it has lasted this long & only needed a couple batteries is reassuring. Thanks for the reply!

Just wanted to say thanks to DC for writing this review. I bought my Trek Madone used so I had no idea what the DuoTrap even was. lol! Also thanks to Andrew for his advice on lining up the cadence sensors. The instructions make it look like you line up the sensors BETWEEN the dots, but by doing that I got very inconsistent readings. Now that I lined them up over the dots it’s working perfectly. I have only one dot on my DuoTrap speed sensor arm so I used that. And I lined up the cadence sensor over the rear dot on the case of the DuoTrap. Perfect! Can’t wait to ride on Saturday and try it out.

Hey – Your site is by far the best reference for any beginner like myself for gear. THANK YOU! I am trying to sync it with my Fenix 2 and it isn’t reading it. Any ideas on how to start troubleshooting?

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I am having the same problem…. frustrating.

Assuming you’ve got blinking lights (always the first step), are you pairing it (a speed/cadence sensor combo) in the menu and it isn’t finding anything? If no lights, definitely swap out the battery first.

Yup.. Got the green light and red light going… Battery is new.. Using the speed cadence combo and when it says searching I turn the pedals.. Any other suggestions?

I figured out how to get the fenix 2 to connect with the duotap integrated bike cadence sensor. first of all I had my watch initially set up with my road bike with the GSC-10 garmin sensor. In order to pair with a new device you have to reset the watch back to original function and then reconnect the watch with the bike sensor, I lil pain in the butt at the end of the day but worth it.

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Just had the duotrap installed, but the candence magnet is touching the sensor a tiny bit every cycle. It touches the rubber cap that cover the tiny screw to fix the sensor. Had to slide passed that rubber cap. Anyway, it just shows how close the magnet is to the sensor … only the thickness of 1 piece of paper fit in between. Sensor was immediately picked up by my new Garmin 510 and actually worked instantely. Perfect!

For what it’s worth please note that I’m just starting to receive weak signal battery on the Node and sensor error in the middle of my 4th season !!! Started out on my 2011 Madone 5.2 with Node 1 but it failed within a year. My LBS change it under warranty in 2012 for a 1.1. Now tomorrow, I will change the Node battery and the Duotrap battery too while “playing” with batteries … I’ll be set up for a couple good peacefull season battery wise. PS : I’m in Canada, bike season is about 6 months … but never removed the battery ’cause using the bike on a trainer in winter …. Will buy a Garmin Edge 1000 soon ….

Appreciate it! Loads of advice.

can’t get the cadence to work on the fenix 2, any ideas?

Ensure you’re pairing as a speed/cadence combo sensor and not just a cadence sensor.

if you have two bikes as I do. you have to reset your watch to pair a new cadence/speed sensor. I have to do this every time I switch bikes. Either way… try resetting your watch back to factory settings and let the first thing you do is pair with the bike… let me know if that works.

Hi guys will the duotrap sensors be compatible to the cateye strada wireless computer. Many thanks for all your advice

No, the Strada is not ANT+ enabled, and thus not compatible with the Duotrap.

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I have paired this with my Timex cycle trainer 2.0 but the speed maxes out around 5 mph. Any suggestions?

It’s fully compatible, so it sounds a bit like the wheel size value might be off. Try something semi-standard like 2096 and see if that works out.

Forgot to mention that your solution worked. Than!

So that’s a no to the DuoTrap being compatible with Cyclemeter on an iPhone?

If you have the Wahoo Fitness iPhone key, then it’d work.

Have a Trek Emonda SL6. Going to get a Garmin 500 or 510 (great review btw). Would you recommend the Duotrap S or the new Garmin speed and cadence magnet-less sensors (another great review, btw). Aesthetic wise they are about the same. Big difference is wheel magnet vs. hub mount for speed. How about functionality/accuracy, or other thoughts? Thanks!!

I know this is an old thread, but wanted to report that Bontrager does now have a combo Bluetooth smart/ANT+ version of the Duotrap. Just installed it in a 2014 Madone 4.3 Aside from the additional protocols, it’s identical to the old version. Part number 508126

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With the recent upgrade of Garmin software on my 800 . My duatrap can not connect with the Garmin – any advise my duatrap is 2013 model

Double check that the sensor is still there in the paired devices list. Also double-check that it’s looking for combination speed/cadence sensors, and not just a single sensor type. Also, finally, double check that by coincidence the battery didn’t just die (unsure the lights show up).

Will the gsc-10 fit in the duotrap slot on the Madone 4.5?

No, unfortunately not.

But still mountable to the frame?

It should be, though, I don’t know each frame. But it’s very rare that it doesn’t fit.

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FYI, just got the new Bluetooth AND ant+ Duotrap and it works great! Comes with crank and wheel magnets AND includes a battery. So far no issues working with iphone 6 and the wahoo, mapmyride,Strava and racemyghost apps. Nice.

I upgraded the ANT+ DuoTrap on my Domane with the new combined ANT+/Bluetooth version. Merry Christmas to me! 🙂

Since Ray’s post here seems to be the de facto DuoTrap installation guide on the interwebs, I thought I’d share a few tips here in the comments to speed things along for the next guy or gal.

“The correct hex bit” for removing/attaching the unit in the chainstay turns out to be a 2.5mm allen, which is naturally one size smaller than any of the three-way wrenches or mini-multitools I had handy. 😉

Also, the original ANT+-only DuoTrap (part number 426618) that came ziptied to a cardboard hangcard (pictured above) had the CR2023 battery pre-installed. The new ANT+/Bluetooth DuoTrap (part number 508126) comes in a white box with red lettering, and the battery is now in a sleeve inside with the directions. If you are upgrading like I did, your existing speed and cadence magnets will already be setup, but if you get in a hurry and only swap out the chainstay unit and find the sensor lights don’t light up when you first spin the crank, you’ll know why. 😉

Finally, if you aren’t sure whether your Trek takes the DuoTrap or DuoTrap S, Bontrager has a DuoTrap FAQ page here: link to bontrager.com

Hopefully this speeds up the upgrade process for the next person.

Awesome, thanks for all the part numbers!

Has anyone tried the duotrap with the Cateye Stealth 50? It is ant+ but I heard there may be an issue with the pairing.

Beware… you need to get the correct sensor for your bike. Bike shop personal are not well up on this in general. The web sites do not list the compatibility issues clearly, the component packaging gives no indication of compatibility issues.

There is ..if you search for it,,, a note on the Trek web site. But not in product descriptions or web descriptions of the computer or bikes.

This is a mechanical not an electrical, software or wireless issue.

For those of you that feel the need to silicone the unit in, a little trick I use at work when building speaker boxes. put masking tape on both sides of the joint you want to seal leaving a small gap on either side of the seam. Smear your silicone into the joint then peel the tape off. This makes a clean line of silicone and minimal mess. Silicone will get dirty after time & this helps prevent it from getting ugly around your sensor. Just ordered my Duo Trap and the Node 1.1. I’ll be back with my results later.

I have a trek Domane 4.7 bluetooth duotrap sensor. I’m Using Cyclops fluid 2 turbo. The cadence shows up my iPhone 5s using training apps, wahoo, garmin etc but does not show speed and/miles. Any ideas?

I have a trek Domane 4.7 bluetooth duotrap sensor. I’m Using Cyclops fluid 2 turbo. The cadence shows up my iPhone 5s using training apps, wahoo, garmin etc but does not show speed and/miles. Any ideas? Do I need an Ant+ key?

Did anyone tried to use this with Endomondo on a phone with Ant+ capabilities. I have the Xperia Z3 Compact and not able to detect the Duotrap. Mine is Ant+ only version.

Endomondo on Xperia Z3 Compact was easilt able to see the garmin cadence/speed sensor i tried earlier.

Apreciate any feedback on compatibility of endomondo with phone with Ant+ capabilities.

Strava app on the smartphone does not pair with the ant+ sensors directly and need a cycling computer, which makes it a two step process.

How can this work with iPhone 6? Do you need an adaptor?

You would indeed. Though, I think that Bontrager makes a dual ANT+/BLE one now too (I know what does with their BlueSC).

DC, any upgrade for devices compatibility list of new, bluetooth smart/ANT+ dutrap? Especially new Polar’s devices: V800 and V650. Anyone has experience?

DC, any upgrade for devices compatibility list of new, bluetooth smart/ANT+ duotrap? Especially new Polar’s devices: V800 and V650. Anyone has experience?

I haven’t tried the new Duotrap yet.

I just bought a Topeak Ridecase mount for my iPhone 6 and wanted to use the Topeak PanoBike App from the App Store. It’s free. And, one of the great features is that it gives the option for reading elevation and incline, in addition to the usual speed, cadence, and so forth. But the pro gadget guru at the bike shop couldn’t get it to synch with the DuoTrap, even the new one I bought that has Bluetooth in addition to Ant+. Is there a way to make the new DuoTrap work with the PanoBike App?

Unfortunately I haven’t used their app. Some companies will code their apps to just their sensors. I know that the Topeak sensors can be finicky with other 3rd party apps, and have also sometimes failed compatibility tests for standards adoptions. But I don’t know in this case if they are fully compatible on the app side with the standards.

As a former Panobike Cadence/speed sensor user, I can concur with Ray’s assessment. The Panobike died on me and I replaced it with a Wahoo version. Never could get it to pair. The Wahoo unit paired with everything else with no problems. The Trek unit has been just as solid as the Wahoo, if not more so. Have you looked at Cyclemeter as an alternative to the Panobike app?

I just purchased a Trek FS 7.3 WSD and am considering purchasing the duotrap S. I currently use “Map My Ride” on my iPhone 6 plus, and I love it. I’ve used it for about two years. It runs my phone battery pretty quickly but am told that the Duotrap S will use considerable less battery. Not sure how that works.

I don’t know about the Duotrap S but as to battery power, I have an iPhone6 running both MapMyRide and Strava at the same time. I use a Morphie battery inside a Sherpani top-tube bag wired to my iPhone and it keeps the phone charged at 100 percent no matter how long I ride. I’ve been out there six hours and it stays fully charged. I ride a Trek Domane 5.2 with Duotrap that has both ANT+ and Bluetooth senders.

Some how I lost the cadence magnet. Do you know if I can order it seperately? I hate to purchase the whole kit for something so small.

Probably, but honestly, you can walk into any bike shop on the planet and the guys/gals will have a spare magnet in the drawer, many times they’ll just give you if you happen to know the crew and are a good customer.

There’s nothing special about the magnet either. I have chromoly spindles on my pedals and just got a circular rare earth magnet to stick to the end of the axle. I think I bought a ten pack on ebay for less than $5. a 3mm version should fit most axles. Try these for example: link to ebay.com

Plus, I have 9 more I can use to tack things onto my metal tool chest.

Ray, I have a new Domane 4.5 Disc with Bonty Duotrap. I’m getting speed and cadence readings but am NOT getting any Power/Watts output or readings. “Calibrate” is also greeted out and not selectable. Any help? Thanks! Chris

The Duotrap isn’t a power meter, rather, just a speed/cadence sensor. Thus, you wouldn’t get wattage readings (power), or the calibrate option.

Sorry to inform you, I have just failed to sync Polar V650 to duotrap BLE/Ant+. Both before and after firmware upgrade (1.1.8). Anyone has better experience?

I wonder if you can help me. I have a Trek Speed Concept and my Duo Trap used to work fine both on the turbo (inside) and outside (GPS) picking up the speed and power. I have a Garmin 500 and a normal wheel magnet fitted. I also use a Stage power meter.

Recently, the speed sensor does not work on the turbo but the power meter does. I have changed the battery on the Duo Trap but with no success. The speed sensor still continues to work outside as the Garmin is picking up GPS. So frustrating!

Do I require a new Duo Trap? Regards Tim

How do I know if my Garmin 500 is using GPS or the sensor?

Will the duo trap speed and cadence sensor work with my garmin fenix 3

Think I’ll have to take mine back tomorrow. I can not get any of the parts to sync with my Droid Turbo, and can not find if I can get an adapter. If anyone has help or info, I would love to keep it.

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Hello! I have a 2015 Émonda S5 with the Duotrap built-in space. I’m thinking on getting it along with a HR belt and computer/gps. I use Strava all the time on my Iphone and so far that’s the only info i’m using.

I’ve been checking out the new Garmin Edge 25 and the old 500. Not sure yet if that’s the best way to go.

In your opinion, is there a better (more economical) match than the Garmins for this Duotrap that would also sync with Strava directly??

Thank you!!!

I don’t have a power meter, but I do look at the strava/garmin reported power from my 510. It is very noisy, which I’ve always assumed come from GPS spatial jumps/errors making the power calculation uncertain. The DuoTrap, of course, is not a power meter. But since it provides a much smoother distance/speed signal than GPS, would the power reported by the 510 clean up?

Actually Garmin doesn’t do power internally, it’s just a Strava thing they do on the backend via algorithms.

I wouldn’t expect any change at all from switching to a DuoTrap there.

I always thought Strava wasn’t doing their best with their estimated power numbers. They could use measured power from other riders on the same route, and interpolate based on weight differences (they know your weight, their weight) and speed differences (ditto). If they wanted to gild the lily, they could look up wind speed and direction for the time/location of your ride and the other rides. This is straight-up predictive analytics. Something else they could bundle with premium membership?

I’ve had a Node 1 for four years – It has more buttons than previous speedos that I’ve used, and usage is not very intuitive.

But, using the product is not its major pain point – That award goes to the speed with which the Node 1 consumes batteries. I know the device is wireless, but surely, there should be some way to power it down (automatically, preferably) – Any suggestions?

Many thanks

Does anybody tried new Duotrap with Ambit 3 Peak??

Is the Garmin Edge 25 compatible with the DuoTrap? If not then what inexpensive devise would you recommend that displays distance in one hundredths rather than tenths as in the Node 1 which is hard to see in certain light conditions. Thanks!

Yes, it is.

Will the duotrap pair with my Suunto Ambit2 HRM chest strap?

I have a trek duo trap speed cadence sensor on my Trek Silque. I took the plunge and bought a Garmin edge 820. The cadence reads well but the speed is all over the place. Someone told me to take the magnet off because it was getting readings from the satellite as well as the magnet. Thus I would be riding at a steady cadence and the speed would read 15mph one minute and 12mph and then less. In short it was jumping all over the place. I am not particularly tech savvy but why is this happening. Is it the device or user error? I can’t seem to find an answer.

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I ride a Trek Emonda ALR, with the Duotrap S, paired to a garmin 130 (firmware 4.30) I also get erratic speed readings, sometimes even +-10Klm/h!!! I do have a wheel magnet attached to the wheel and i cannot figure it out yet. Maybe removing the magnet from the wheel, will fix it. Have you tried it? Thanks.

Hi just after a bit of help. I’ve installed the bit into my frame, took my pedal of, slid the band on and reattached my pedal. However the band is too thick and there isn’t enough distance between the crank and the frame for the band to fit through so I can’t even do one rev. I’ve had to take it off. Any suggestions on how I can alternatively measure my cadence/speed

Mr Rainmaker,

Love your work. I am trying to pair/sync my Suunto Ambit 2 with the duo trap but, for the life of me, cannot do it. Are you able to give me some instructions as to how to do this please?

Speed and cadence PODS are ticked on moves count but the watch doesn’t search for them (I have found this is the best way to get it to work from the rest of the www)

Any info would be helpful, thanks

This was a 2011 review. Are you still a fan of the trek duo tap and do you know of other manufacturers who now 2017 have frame integrated sensors?

To be fair, it’s been updated to broadcast Bluetooth and ANT+. (The product name now has an “S” in it.)

Since it fits into a Trek frame, reliably counts wheel and crank revolutions, doesn’t go through batteries quickly, and, well, just works, it isn’t clear why it needs an update.

If you don’t own a Trek frame, or are asking what other frames have integrated cadence sensors, … then you might look at:

link to giant-bicycles.com

I’m ready to throw the Bontrager duotrap whilst still attached to bike over into next doors garden!!!! Why won’t it work? It did work for a few miles and I was impressed.It stopped and there’s no way i can re-connect. I replaced the battery too. I’m connecting to a Garmin Fenix 5, or was. Whats going on???? I’ve spent the whole day on this and getting nowhere. There must be some explanation in how to start pairing. I’ve turned bike upside down and spun wheel and crank. To be fair, I’ve had a right workout just in my arms alone, spinning the crank, but was hoping to work the legs. Before anyone replies, I can answer yes to…..battery out and in, and spin twice. I can answer yes to….disconnect from watch and re-connect. I can answer yes to…try another device. I can answer yes to…another battery. I can answer yes to…… move magnets to other positions. I can answer no to……another duotrap !HELP!!

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Can I use this sensor on this bike: link to morpheusbikes.com ? I think it’s a great tech that is worthy to be tried on.

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Thank you so much for your outstanding and incredibly helpful posts!!!

Can the rubber cadence part work on a crank with Watteam power sensors (I want to have both if possible)?

I got me a Trek Emonda back in March. (She SCREAMS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!) Do you have to have a compatible Garmin computer to use the duotap, or could you sync it with an Ant+ app on your phone?

awesome article thank you for all of the pictures.

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I don’t suppose anyone knows how to just pair the cadence only? My Lezyne GPS has a problem which the Developers are working on, the refresh rate of the Speedo is to slow so it takes 8 seconds of being stopped before the gps will auto pause – disconnect the duotrap and is the GPS for speed and it’s fine! But, of course, I lose my cadence 🙁 Any ideas? It won’t pair if I just select cadence, and not getting much help from Trek…

Is there an app on your phone you can use instead of buying the monater from a store?

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Bontrager DuoTrap Digital Speed/Cadence Sensor

Bontrager DuoTrap Digital Speed/Cadence Sensor

Bontrager's DuoTrap Digital Speed/Cadence Sensor pulls double duty for your ANT+ cycling computer. It wirelessly transmits speed and cadence data and fits directly into the chainstay of certain Trek bicycles for a clean look that installs in seconds.

ANT+ compatible

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Bontrager DuoTrap S Digital Sensor

Bontrager DuoTrap S Digital Sensor

An ANT+ enabled, Bluetooth® Smart ready integrated frame sensor that wirelessly transmits data to computer or phone.

£37.59 £46.99

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Say goodbye to zip ties

Bontrager DuoTrap S is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

  • ANT+ 2.4 GHz and Bluetooth® Smart wireless digital speed and cadence sensor
  • ANT+ and Bluetooth® Smart allow simultaneous use of Trip 300 and smartphone
  • For use with all ANT+ and Bluetooth® Smart wireless technology-enabled devices
  • Includes a Bontrager wheel magnet, crank cadence band and CR2032 battery
  • Visit thisisant.com for a complete list of compatible devices
  • Visit bluetooth.com for a complete list of compatible devices

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We aim to provide efficient delivery on all packages to mainland UK addresses. There are some areas where we will need to charge slightly more due to postage costs such as Highlands & Islands, Southern Ireland & Isle of Man.

Delivery is charged at £5.95 for standard delivery to UK mainland (see below for exceptions). Next working day delivery available for £6.95 if order before 1pm.  Bikes are subject to £10.00 carriage charge. Exceptions can be found below. E-Bikes are subject to £30.00 carriage charge due to higher weight and value involved for insurance purposes. 

Free delivery is available for orders over £75 and is a 2 working day service.

Orders placed before 12pm Monday to Thursday will be shipped the same day for next day delivery. Orders placed after 12pm Thursday and onwards will be shipped on Monday.

DUE TO THE CURRENT HIGH DEMAND, DELIVERY TIME FOR BIKES IS 7-10 DAYS. ALL PARTS AND ACCESSORIES ARE STILL 1-2 DAYS.

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DPD offer an excellent delivery service, with full tracking information and an hour time slot given on the day of delivery. You can also change the destination of your parcel, including local drop off points.

*Saturday delivery can be arranged at extra cost, please call for details.

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Unfortunately due to the policies of our chosen shipping companies we regret that we will have to apply a separate charge to selected postcodes in the UK for some of our packages. If we need to apply this charge we will contact you after your order has been placed and work out the extra shipping charge. We do ship outwith the UK, please contact us for prices and options.

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Bontrager DuoTrap S Digital Sensor

Bontrager DuoTrap S Digital Sensor

Connect ANT+ and Bluetooth Smart devices to all of the data available from the DuoTrap S sensor for your on-the-bike wireless needs. • ANT+ 2.4 GHz and Bluetooth Smart wireless digital speed and cadence sensor • ANT+ and Bluetooth Smart allow simultaneous use of Trip 300 and smartphone • For use with many ANT+ and Bluetooth Smart wireless technology enabled devices • Includes Bontrager wheel magnet, crank cadence band, and CR2032 battery • Works with Trek DuoTrap compatible bikes

Part Numbers

Bontrager DuoTrap S Digital Sensor

Bontrager DUOTRAP S Manual

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Bontrager DUOTRAP S Manual

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Summary of Contents for Bontrager DUOTRAP S

  • Page 1 • 90˚ 180˚ Speed magnet. Tighten Align with tech mark on DuoTrap S. If necessary, rotate speed magnet on spoke. magnet 90˚ – 180˚ to achieve sensor clearance. Verify magnet sensor alignment by illumination of red sensor LED as wheel is rotated.
  • Page 2 Cet appareil est conforme aux limites d’exposition à la fréquence radio (FR) d’IC et de FCC. La puissance de sortie émise par l’appareil de sans fil DuoTrap S est inférieure à la limite d’exposition aux fréquences radio d’Industry Canada (IC). Cet appareil est en contact direct avec l’utilisateur dans des conditions normales d’utilisation.

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  • Bontrager DuoTrap S Digital Sensor

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IMAGES

  1. Bontrager DuoTrap Digital Speed/Cadence Sensor

    duotrap bontrager trek

  2. How to install a Bontrager Duotrap S on a Trek FX Aluminum Frame

    duotrap bontrager trek

  3. Test: Bontrager Trip 300/DuoTrap S Sæt

    duotrap bontrager trek

  4. A look at the Trek/Bontrager frame integrated DuoTrap ANT+ Speed

    duotrap bontrager trek

  5. A look at the Trek/Bontrager frame integrated DuoTrap ANT+ Speed

    duotrap bontrager trek

  6. TREK BONTREGER DuoTrap Integrated Speed and Cadence Sensor || Gravel

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COMMENTS

  1. Bontrager DuoTrap S Digital Sensor

    Bontrager DuoTrap S is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

  2. Bontrager DuoTrap Review

    The Bontrager DuoTrap. Trek takes integration a step further, throwing out the zip ties and rubber bands of old with the Bontrager DuoTrap, which recesses neatly into a special compartment in the bike frame. The original DuoTrap placed a sensor compartment on the outside of the bike frame, while the newest DuoTrap S model fits neatly between ...

  3. How to use duotrap bontrager bluetooth

    Bontrager DuoTrap is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved...

  4. How To Fit A Bontrager Duotrap Speed and Cadence Sensor

    Now it's time to let the sensor see the magnet. Step 5: Fit The Magnet To A Wheel Spoke. Like pretty much every other speed sensor, the Duotrap calculates velocity based on how many times your wheel rotates as you ride (specifically, how many times a magnet attached to one of your rear wheel spokes passes within range of its tractor beam). You need to fit said magnet to said spoke.

  5. Bontrager Duotrap S Digital Sensor

    Trek Duotrap S Digital Sensor. Speed and cadence are two of the most important and interesting metrics for all cyclists, so if you are riding a compatible Trek why not get them wirelessly with this Bontrager Duotrap S Digital Sensor.With ANT+ and Bluetooth connectivity, this sensor is easily connected to any device featuring these, such as your cycle computer or mobile phone.

  6. A look at the Trek/Bontrager frame integrated DuoTrap ANT+ Speed

    A look at the Trek/Bontrager frame integrated DuoTrap ANT+ Speed/Cadence Sensor. A few weeks ago The Girl brought home her new bike, the Trek Speed Concept, which is one of the very few bikes out there that includes the option to add a frame-integrated ANT+ speed/cadence sensor. The sensor kit fits into the frame itself - becoming quite ...

  7. How to install a Bontrager Duotrap S on a Trek FX Aluminum Frame

    In this video I will be installing a Bontrager Duotrap S Wheel speed and Cadence sensor onto a 2020 Trek FX 3 bike. The cadence sensor wouldn't work with my...

  8. Bontrager DuoTrap Digital Speed/Cadence Sensor

    Brand: Bontrager, Product: DuoTrap Digital Speed/Cadence Sensor. ... It wirelessly transmits speed and cadence data and fits directly into the chainstay of certain Trek bicycles for a clean look that installs in seconds. ANT+ compatible Part Numbers. UPC MPN Store SKU; 601479220083 508126 COM41667426R:

  9. Bontrager RIDEtime Elite Cycling Computer with DuoTrap S

    Simple to set up, easy to use. RIDEtime Elite Cycling Computer with DuoTrap S feeds you the metrics you need to rock every ride. The included DuoTrap S ANT+ sensor offers real-time speed and cadence so you can target more productive workouts and better recovery rides. Simple setup and an intuitive one-button interface get you riding faster ...

  10. PDF DuoTrap

    DuoTrap DuoTrap Sensor Speed Magnet (wheel) Cadence Magnet (crank) Open Battery compartment. Remove DuoTrap cover from chainstay using a 2.5mm hex. Snap magnet onto inside/trailing edge non-drive side spoke. Some carbon frame/wheel combinations may require the magnet to be flipped so the thin side faces sensor. Gently tighten wheel magnet on

  11. Duotrap S worth it? : r/TrekBikes

    I have the Duotrap S and it works great. My computer is the Bontrager Trip 300, which is small and light, and has all the basic stuff like speed, distance, cadence, odometer. The sensor also pairs with my phone (Pixel 3a) using the Ride with GPS app, which I use for turn by turn navigation. It pairs with my watch as well (Garmin Vivoactive 3 ...

  12. Bontreager DuoTrap S Digital Sensor

    Bontrager DuoTrap S Digital Sensor. Say goodbye to zip ties. Bontrager DuoTrap S is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

  13. Bontrager DuoTrap S Digital Sensor

    60147921344. The Bontrager DuoTrap S is a must-have digital sensor for those compatible Trek bikes. The Bontrager DupTrap S installs in seconds and fits directly onto the chainstay of select Trek bikes for a super clean look and better aerodynamics. The Bontrager DuoTrap S wirelessly transmits ANT+ and Bluetooth® Smart signals to your bike ...

  14. Bontrager DuoTrap Digital Speed/Cadence Sensor

    Every time. Bontrager DuoTrap is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

  15. Installing a Bontrager DuoTrap S Sensor on a Trek Domane

    Short video showing how easy it is to install a Bontrager DuoTrap S speed and cadence sensor on a Domane. And this video gave me an excuse to sit in the bas...

  16. Bontrager DuoTrap S Digital Sensor

    Say goodbye to zip ties. Bontrager DuoTrap S is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

  17. Bontrager DuoTrap S Digital Sensor

    • Works with Trek DuoTrap compatible bikes Part Numbers. UPC MPN Store SKU; 601479213443 437960 COM42465012R: Reviews. ×. Bontrager DuoTrap S Digital Sensor $49.99. $74.99. X. Stay in the Loop. Exclusive deals and community events delivered to your inbox. Subscribe. Do Not Input. Peachtree City . 1801 Georgian Park

  18. Does Bontrager DuoTrap S work with Garmin Fenix 6?

    DuoTrap is proprietary to Trek bikes. However, it transmits data using the ANT+ and BlueTooth Smart protocols, which are open protocols and are used by almost all modern cycling computers. It would be a very strange decision to use some sort of proprietary protocol to limit the rider's choice of head unit. In any case, Bontrager doesn't make ...

  19. Bontrager DuoTrap Digital Speed/Cadence Sensor

    Spot-on. Every time. Bontrager DuoTrap is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

  20. BONTRAGER DUOTRAP S MANUAL Pdf Download

    m. •. 2. Align with tech mark on DuoTrap S. If necessary, rotate. magnet 90˚ - 180˚ to achieve sensor clearance. Verify magnet sensor alignment by illumination of red. sensor LED as wheel is rotated. NOTE: LED will only illuminate for the first 10 revolutions.

  21. Bontrager DuoTrap S Digital Sensor

    Bontrager DuoTrap S is the integrated sensor that wirelessly transmits ANT+ and Bluetooth® Smart signals to your computer or phone. The easy-to-use sensor installs in seconds and fits directly into the chainstay of select Trek bicycles for a clean look and preserved aerodynamics.

  22. TREK BONTREGER DuoTrap Integrated Speed and Cadence Sensor

    After converting the Trek Emonda to a Gravel bike, I wasn't able to use the power pedals. In the mud and sand, the cleats become full and wouldn't unclip. So...