GARMIN 010-10644-00 Speed/Cadence Sensor

Great addition to anyone whom already has a Garmin compatible watch! Easy to use, install, and connect. I have no other products/experience with other biking computers but I couldn't imagine them being any easier than this. Provides great feedback on cadence, speed, etc.

The item is fine and quality outstanding however shape is not "modernized" with the trends in aluminum-formed chain stays. So the first one I bought disappeared but the second time around I was able to secure it better and keep it going better. I'm happy.

Amazon...

Another good job. Exactly what I wanted, on the delivery time I needed.

Thanks.

The GSC 10 uses two magnets to pick-up the speed (magnet on rear-wheel spoke) and cadence (magnet on the inside of the left crank). The installation is pretty straight forward, although, the illustrations in the directions were not the most useful.

The system has worked well so far. I have not been over the worst 'bumpy' areas yet on my MTB but have been through some rough terrain and nothing came loose.

The FR-305 is supposed to use the speed from the GSC 10 when it cannot get a lock on the GPS satellites. When MTB'ing, which many times involves making many small turns, the GPS mileage reading tends to be a little short. Thus it would be ideal of Garmin could somehow combine the readings from the GPS & GSC 10 to get a more accurate reading.

Does everything as advertised. With the bicycle function, it makes me happy I bought the 305 vs. the 405. I can only kick myself for buying an actual bike computer three months earlier.