If your rides include a fair number of climbs and descents, use the the Mavic Wintech USB ALTI Bike Computer to track vertical gain, climbing speed, and altitude. The ALTI also delivers real-time data on speed, average speed, and accumulated distance, and includes a stopwatch for interval training. When you arrive home, plug the ALTI computer directly into your PC and download the data so you can congratulate yourself on a ride well done and track your progress day to day. The ATLI can manage data from two different bikes as well as your home trainer.