HOW UGEARS U-9 GRAND PRIX CAR WORKS\nUGears U-9 Grand Prix Race Car features a fully functioning 16-valve V8 engine, link rod and transmission that switches the modes from idle to reverse and to forward. It has a spring-suspended fork and wheels with rubberized genuine sports tires that ensure a rapid acceleration, yet smooth ride. Like all UGears vehicles models U-9 is set in motion by a rubber-band wind up motor. Simply crank up a handle located in the front of the model and watch it race a distance up to 10 meters.