Monitor your speed as you ride with this easy-to-install wireless sensor. With no magnets or other exposed parts to line up, this sensor is easy to install, maintain and move between bikes.Easily mounts to front or rear hubProvides accurate speed and distanceNo magnets or other exposed partsSet up wheel size using the Garmin Connect appSelf-calibration with Edge cycling computer or compatible Garmin devicesThe Garmin Speed Sensor 2 is easy to install and involves no magnets or exposed parts. The sensor is easy to set up and you can set up wheel size using the Garmin Connect app for improved accuracy. The sensor self-calibrates with an Edge cycling computer or compatible with Garmin devices. The wireless sensor will transfer data to a compatible head unit or app using ANT+ and Bluetooth so you can view your stats in real-time and make the most of every ride or training session.