Wahoo RPM Cycling Cadence Sensor for Outdoor, Spin and Stationary Bikes, Blue

Options for attachment work just fine, settled for the offside crank arm. Appears to be perfectly accurate and there's no trouble interfacing it to either Wahoo Fitness or Locus Maps. It appears you can only link it to one app at a time.It's not difficult to get access to the battery to replace it, the holder pops open with the twist of a coin in a slot on the side.The silicone rubber holder that I'd have thought would have been ideal needs to be mounted in such a way that the cable ties used to secure it would have to be removed to remove it from the holder. Which doesn't make a lot of sense to me...Apart from that, the only other gripe was that the supplied battery was at 25% on first use. But then the thing activates on movement, so I'd imagine it must have been activating on and off all the way through the delivery from the warehouse. Might be an idea to have the battery separate or insulated in the device.Incredible that they've got the sensor, BT/LE, and microcontroller all tucked away in such a small case...

When my local bike store owner suggested that riding at higher cadence in the larger cogs is more efficient, I had no way of tracking cadence. After some googling, the research supported people like me (cardio-fit and skinny but not powerfully built) riding at high cadence, and I set out to find a good cadence sensor that would work with my Polar Vantage M sports watch.The Wahoo is great because all I had to do was link it to my watch and I carry the sensor in my sock, so that I can easily use it on both my MTB and road bike. I also tried it for running but it makes a distracting click each step and watch measures running cadence anyway. The battery can easily be changed and lasts a long time.A great purchase for both ease of use and low cost.

Used with: Garmin Edge 1030This little gadget works perfectly. It was easy to fit using the double-sided tape supplied, since I have cranks with flat inside surfaces. In case you have cranks with curved surfaces, the unit comes with a snug little holder which zip-ties to the crank. It synced to my Garmin immediately, it starts up quickly and automatically, and it just works, every time. Cadence readings appear to be as accurate as you could hope for - there's often a delay of a couple of seconds before the reading changes in response to a change in cadence, but this could be the Garmin doing a time-averaging thing - it's not easy to update a display rapidly when measuring something that's only turning at little more than one rev per second. The big news for me is that so far, after using it for around 10 hours of riding, I haven't seen a single drop-out.It's certainly infinitely better than the Magene sensor I bought originally, and which went into the scrap bin after a couple of rides due to continual signal drop-outs. If you're wondering which of these sensors to buy, I'd recommend you buy this Wahoo sensor - don't waste your money on the Magene.I would have given this unit five stars, but I have to knock off one star because of the very soft plastic the sensor is made of - when the time comes to change the battery I think it's going to be difficult to prise open the battery compartment without causing some serious damage. Well, we'll see when the time comes, in the meantime I'm very pleased with it.EDIT: I've just bought a second unit for one of my other bikes, and it arrived with a dead battery. The manufacturer stupidly ships these units with the battery already installed and connected, so every time the unit moves while in transit, it gets activated. The first one I bought was ok, not so the second one.So as I had to change the battery, I was forced to find a tool to prise the unit open without damaging it. The only thing I can find to do the job is a ball-link plier used for separating the links used in RC planes, such as this one: https://www.amazon.co.uk/ATATMOUNT-Metal-Oblique-Helicopter-Repair/dp/B08NJR2WKS. I have two on hand and they do the job. If you don't happen to have one lying around though, it's pretty annoying to have to spend a tenner for a tool just to change the battery.

I've been using this device with my indoor smart trainer since I got it in June. The reason I got it is that the cadence monitor of the trainer was too sensitive and as a result would fluctuate wildly (10 - 15 rpm either side of my target) making it very difficult to maintain a steady cadence when using some of the workouts that relied upon it. This unit attaches easily to my shoe, allowing me to use it anywhere I need to, and has smoothed out the feedback considerably making those workouts much less frustrating to carry out. All in all a good little unit that attaches well with both Bluetooth and ANT+

Be aware that this only works with certain Garmin Edge devices (check the "thisisant" website for compatibility with your device), not all will accept a cadence only sensor. I have a Garmin 500 and this does pick up the cadence sensor just fine. I had a combined speed/cadence sensor that sits on the chainstay before I got this and although I liked it, I'd lost the speed magnet off the wheel and I never liked having all that stuff strapped to the bike. With the RPM I have the choice of attach this to the crank via sticky pads or zip ties, OR to my shoe (like those footpods). I went for the latter, which means there is nothing attached to my bike to clutter it up and attract dirt, it also means the sensor works on all my bikes as I just attach it to whichever shoes I'm wearing (5 second job), it even means I could use it on a stationary bike in a gym (but why would I when I have a real bike and real roads to ride on?)Overall I'm pleased with it, it doesn't tend to sense slower cadence (i.e. less than 40rpm) that well, but on the whole it appears to work just as well as my old ant+ sensor that relied on a magnet. I could have gone for the Garmin version of this, but felt this was better as it supports Bluetooth, so hopefully is a little more future proof and will work with a wider range of devices (including connecting to my phone).