The tacx genius is an interactive trainer that offers the most advanced brake of all the tacx trainers with rear wheel drive so you can enjoy a highly realistic cycling experience the motor brake is able to apply a maximum power of 1500 w to the back wheel and will speed up during a descent the slopes simulated are realistic up to 20 and down to 5 for descents when calculating the brake resistance all physical formulas a cyclist encounters on the road are applied to reach a true situation