Derived from Motocross, Supercross is a form of racing using powerful off-road motorcycles on enclosed-circuit dirt tracks. But this isnêt just a straight race. The high-octane sport presents competitors with a range of obstacles and jumps to navigate whilst trying to stay ahead of their opponents. Riders generally have to deal with a mixture of bumps, ridges and steep climbs. Itês not as fast as some forms of off-road motorcycle racing but the complexity of the tracks does make them more difficult for the riders..