Monitor your pedalling cadence 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.The Cadence Sensor 2 fastens to any size crank arm and measures pedal strokes per minute so you can get the most out of your training. ANT+ connectivity and Bluetooth Low Energy technology let you send cadence data to our Garmin Connect online community and other training apps, compatible devices and fitness equipment for better data when you ride indoors and outdoors.