I installed these sensors on my bike about 9 months ago. Initially I had problems with the speed sensor spinning up during my rides. After lots of testing, I decided I needed to use a smaller piece of tape to attach the sensor to my rear hub. Since then the sensor seems to have worked better, but on my last ride the sensor showed a 3% overshoot. I had a more serious problem with the cadence sensor. On three trips since July 3, 2021, the sensor has been reset multiple times during the trip (probably 10 devices have been reset per trip). The sensor behaves as if the battery had been removed and replaced. However, the battery compartment is closed and the seal is intact. I can't reset the sensor with a shock (acceleration, not electrical current). I think you get what you pay for. These sensors appear to work, but with a purchase like this, that's not enough. UPDATE: After reading my review, Wantacme sent me a replacement cadence sensor. It works well.
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