When you want to know all the details of your time spent spinning cranks, install the NiteRider Rebel 8.0 Digital Wireless Computer on the ol' two-wheeler. You'll have instant access to the essentials, and more advanced information like power output, heart rate, and altitude. The Rebal 8.0 can also be expanded with the separately available cadence kit, and two wheel settings allows you to use it on multiple bikes.