CycleOps PowerTap 7005p Cyclocomputer w/ Mavic Open Pro

Tune lets you get your information from the bicycle-mounted computer or download all the stored performance data to your PC. Design and evaluate your training using the only objective measure of effort: your power output (watts). External factors that influence speed and heart rate (like hills, wind, diet and age) can cause you to misinterpret heart rate data, resulting in over or undertraining. The power-sensing hub weighs only 200g over an Ultegra® rear hub, and the Computer offers power measures, heart rate monitor and cyclocomputer functions. Power measures: instantaneous, maximum, and average watts, average split and torque measurement. Cyclocomputer functions: speed, average speed, maximum speed, trip distance, total distance, cadence, total time, clock, auto start/stop. Power accuracy: 1.5%±. Digital wireless power sensor. Comes complete with the manual, Training with Power, written by Joel Friel (author of Cyclist's Training Bible). To download your data, use the Tune Link, sold separately. Includes: Mavic Open Pro Silver 32 hole clincher rim, 14/15ga. spokes, three-cross, heart rate transmitter belt. System requirements for Tune Link: Windows 95/98/2000/NT, CD-ROM drive, and serial port. USA.