The Tacx I-Genious is an interactive trainer with the most advanced resistance unit & training software to simulates a very accurate cycling experience The Tacx I-Genious is an interactive trainer with the most advanced resistance unit called the motor brake. In combination with the Tacx Trainer software 4, Advanced, the motor brake simulates a very accurate cycling experience. During a climb, the resistance on the rear wheel increases & during a descent the resistance unit speeds up, so it feels as if you are going downhill. When linked with your computer the bike course is displayed on your computer screen. You can also participate in online races, where you can see all your competitors. The Tacx I-Genious can be set up in no time thansk to the communication between the resistance unit, handlebar interface & computer being completely wireless. Got a race coming up the i-Genius Multiplayer is supplied with a 12 month license for web racing & the fold out Black Track steering frame to enable you to race online against your friends- let the betting commence. The Motor Brake The Tacx I-Genious motor brake is an advanced resistance unit providing the most realistic cycling experience. The resistance is dynamically controlled, it is constantly calculated & adjusted in order to simulate natural road resistance, even for descents. When calculating the brake resistance all physical formulas a cyclist encounters on the road are applied to reach a true situation. Air & rolling resistance, gradient percentage, weight, air pressure, wind speed, temperature, altitude, inertia & brake properties are all taken into account & calculated hundreds of times per second to achieve a realistic feel. Tacx trainers feature a dynamic control of the braking force. Other trainers use a flywheel to pass the dead centre, Tacx trainers constantly adjust the resistance to simulate the most natural handling. Thanks to the dynamic braking system virtual climbs become real challenges. The i-Genius Multiplayer even has a downhill drive. The wheel keeps turning, just like in real life you do not have to pedal. This Tacx trainer best approaches reality. What is Zwift?