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IB13: Wahoo Fitness Adds RPM Magnet-Free Bluetooth Cadence Sensor

Written by Tyler Benedict
5 Comments
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Wahoo Fitness has been on a roll lately, adding updates (like their Strava Segmets app for indoor trainers) and products (like an ANT+ RFLKT cycling computer) on a regular basis. Now, they’ve simplified the cadence sensor with a single-piece Wahoo RPM Bluetooth unit that sticks directly to the crank arm.

It’s just 7g and requires no magnet. It communicates wirelessly with your smartphone to transmit cadence data via Bluetooth 4.0. Retail is $49.99 on it’s own, or find it bundled with the RFLKT or PROTKT iPhone case.

In other news, now you can get your ride data pushed to the RLKFT from another app while keeping your phone safely in your pocket. They’ve partnered with MapMyRide and come October, that app will support the RLFKT computer. They’ve also worked with BKOOL training software to add support for their KICKR trainer.
Tyler Benedict
11,281 articles

Tyler Benedict is the Founder of Bikerumor.com, where he’s been writing about the latest bikes, components, and cycling technology for almost two decades. Prior to that, Tyler launched and built multiple sports nutrition brands and consumer goods companies, mostly as an excuse to travel and ride in new places.

Based in North Carolina, Tyler also loves the Vanlife & family adventure travel and is always on the lookout for the next shiny new part and off-grid adventure.

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Ryan
Ryan
11 years ago

I know it’s only a cadence sensor but maybe this will help push stages to figure it out for carbon cranks… I can see a stages 2.0 soon.

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Peter
Peter
11 years ago

I would be into it if it was an ANT+ unit.

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Victor
Victor
11 years ago

Ryan, not sure how this product would push stages. Stages can already do this as they have a power meter built into their unit. They could stick one of their pods to a carbon crank and get cadence.

However, the limitation to stages being bonded to carbon cranks is because of power. The modulus of carbon cranks are not as consistent as metallic cranks from part to part. The fiber orientation of carbon can vary from part to part because it is done by hand. A consistent modulus is absolutely required for the measured strain picked up by the strain gages to be converted accurately to power. You might be able to do this by calibrating a crank and formulating a power conversion formula for every single carbon crank but that’s not cost effective.

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Victor
Victor
11 years ago

Sorry, the second line should say “as they have an accelerometer* built into their unit”

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Ryan
Ryan
11 years ago

Thank you for that, Victor. I already knew all of that. Just saying it would be nice if stages could get it to work with a carbon crank.

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