The Tacx Genius is an interactive trainer that offers the most advanced braking of all the Tacx trainers with rear-wheel drive, so you can enjoy a highly realistic cycling experience. The motor brake can 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. Air and rolling resistance, gradient percentage, weight, air pressure, wind speed, temperature, altitude, inertia and brake properties are all considered and calculated hundreds of times per second to achieve a realistic feel.