Garmin010-12843-00 Speed Sensor 2, Bike Sensor to Monitor Speed, Black

This works great with the app. I first used a Garmin for step counting. Then I got into biking and the steps didn't register. This works great registering bike workouts on the app! The other bike device for motion sold by Garmin doesn't work on the app and you must ONLY buy this one to have the app working with the bike. I love it and use it daily.

Connected right away with a strong signal. I use this with a resistance trainer for Zwift and it works perfectly. I bought this to replace a cheap, off-brand sensor that I got bundled with a trainer. I absolutely love the trainer, but the speed sensor had terrible battery life and stopped working after 350 miles. So far so good with this one. I have high hopes. I've had nothing but good experiences with Garmin. I LOVE my 935. It's never let me down during triathlon training and I'm sure this sensor will be no different.

Great addition to my bike. It's more accurate than just an app. Works great with my Garmin edge 1040

I purchased this as a replacement for the previous version of Garmin speed sensor. Not that the old one is broken, but it needed a magnet attached to a spoke for it to work, so it became inflexible. This one just attaches around the hub is easy to install and move to different bikes/wheels without any tools.Pairing it to a bike computer or watch is also very easy, and it self calibrates for wheel size. Very happy.

The product is fine when it works. It does just what it says it will, and is easy to connect to an app on a cellphone. However, as other people have noted, it does tend to drop connection...sometimes even while in use. I've lost ride data (day, time, and distance) on several occasions now, only finding this out after completing the ride and comparing to other timers I have. Sure, reconnecting the device is easy enough, but needing to is frustrating. Also, while connected to the cell phone app, the device does not provide real time information...at least not in any fashion I have seen. This means any lost connection to the device will only be noticed after it completes a synch/upload so you can see it in app. Maybe this is different when tied to a Garmin bike computer, but I have yet to try that.

Garmin has once again created a great product. Good seller with quick shipping also.

This is my second Speed Sensor 2 from Amazon. First unit purchased last year. Sold and shipped via Amazon. Sync'd with Gamin Connect app. Upgraded firmware. Using the sensor with a 3rd party cycling computer. Zero issues.The second unit I purchased was sold by a 3rd party vendor and shipped by Amazon. I had all sorts of problems with this unit.Problem #1. The unit came up on Garmin Connect app with an odd name. The correct name should be Speed Sensor 2. This unit came up as BSG 2 SPD(?). (I'm not 100% certain what the name was. The unit has already been returned to Amazon.)Problem #2. I could not update the firmware on the sensor. Tried multiple times, got multiple failures.Problem #3. I tried sync'ing the sensor to my cycling computer and it would sporadically send speed info.I have this weird feeling that this is some sort of counterfeit product. Problem #1 and #2 are dead giveaways for counterfeit products.I wrote this review to alert potential buyer to be on the lookout for counterfeit products.My overall rating is based on the legit Speed Sensor I purchased last year. It really works well.

I bought the Garmin Speed Sensor to put on my bike on a trainer to make it easier to add data to Strava. Setup seemed to be fairly easy to do. Unfortunately the sensor cuts off my workout early if I get off the bike for even a brief period and doesn’t record anything after I continue pedaling. The first time, I hopped off the bike briefly to adjust the resistance on the trainer and got back on and continued my ride. Unfortunately, it stopped my ride and didn’t record anything after that point. The second time, same thing. I hopped off to do a quick stretch. I was off the bike less than thirty seconds (I timed it) and jumped back on to continue pedaling. It stopped my ride again at that point and no further data was recorded. I would even be ok with it if it would at least record it as two different rides so that I wouldn’t lose mileage/avg/max data. Very disappointed.