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Monitor your bicycle's speed with the Garmin Bike Speed Sensor. With no magnets or other exposed parts to line up, this bicycle speed sensor is easy to install, maintain, and move between bikes. The Garmin Bike Speed Sensor uses ANT+ wireless technology and is compatible with select Garmin bike computers and smartwatches.
The speed sensor attaches to the hub of either wheel and self-calibrates when connected. It's designed to give you accurate speed and distance, whether you're outside on the road or trail or indoors on the turbo trainer. Its user-replaceable CR2032 battery lasts up to 1 year, and the sensor comes with a sleeve to strap it securely to your wheel's hub.