GARMIN Bike Speed Sensor
Monitor your speed as you ride with this easy-to-install wireless sensor.
The speed sensor attaches to the hub of either wheel and self-calibrates with your Edge® to give you accurate speed and distance at all times, including indoors on the turbo trainer.
Simply attach the sensor and ride. With no magnets or other exposed parts to line up, this sensor is easy to install, maintain and move between bikes.
Water-rated to 1 ATM ANT+ wireless connectivity does not work underwater.