CompuTrainer provides the most interesting indoor bike experience yet created. It increases your cycling power by 20 to 30% and your speed by 2 to 4 MPH. Whatever your starting point, you’ll improve significantly. CompuTrainer is best in its class by a wide margin. It sets the industry standard for accuracy (± 2.5%), power (1500 watts), quality, and service lifetime (10+ years). Exclusive performance features like SpinScan™ electronic pedal stroke analysis and Adjustable Aerodynamic Drag Factor are unique to CompuTrainer. Cycling and triathlon coaches worldwide use CompuTrainer as their primary testing instrument. USA Triathlon and USA Cycling test and train their team athletes with CompuTrainer Velotron is a computer controlled, precision electronic bicycle ergometer/trainer of a proprietary new design. It's mechanical design provides the highest laboratory grade accuracy and repeatability, the widest load range of any commercially available electronic ergometer, high durability/low maintenance, and an authentic road feel that closely simulates riding outdoors. The system uses an innovative patented eddy current brake built around a heavy (55lb), large diameter flywheel with an internal freewheel. It uses a fixed ratio, high efficiency chain drive. Shifting is accomplished electronically with "virtual" gearing.