Garmin Speed Sensor 2
The Speed Sensor 2 is a wireless speed sensor that mounts on your wheel hub, tracking wheel rotations to calculate speed and distance data as you ride.
How It Works
The sensor is motion-activated: it wakes up automatically after two wheel revolutions, indicated by five seconds of green LED flashing. When the battery is low, the LED flashes red instead. Depending on the shape of your wheel hub, the sensor may sit slightly tilted once mounted — this has no effect on its accuracy.
Pairing and Connection
The sensor communicates with compatible Garmin devices using ANT+ and Bluetooth wireless technology. The first time you connect, the device and sensor need to be paired; after that, the connection is established automatically and securely each time the sensor is activated, as long as it's within range of the device.
While pairing, keep the device within 3 m of the sensor, and stay at least 10 m away from other wireless sensors to avoid accidentally connecting to the wrong device. The sensor can pair with up to two Bluetooth devices at once, along with any number of ANT+ devices.