Timex ANT+ Bike Speed/Cadence/Distance sensor T5K445 stay informed about your latest ride and beat your personal best with this Bike Speed and Cadence Sensor from Timex. – It tracks all kinds of data and then communicates it wirelessly to the Timex Global Trainer. It also attaches easily to your bike so you can use it every time you go for a ride. – This innovative sensor allows you to view your speed, cadence and trip distance on your bike with ease so you can stay informed about your fitness and cycling skills. – The wireless transmitter mounts easily onto to the non-drive side chainstay of your bike and communicates with the Timex Global Trainer wirelessly so you can keep track of all the data from your ride.