Quad bikes are motorised sit-astride vehicles that travel on four low-pressure tyres on unpaved surfaces. They have a seat designed to be straddled by the operator, with handlebars for steering control. These vehicles are intended to be used by a single operator - without a passenger. While Quad bikes are designed to cope with a wide variety of terrain types, including steep slopes, they can't go everywhere and do everything. If used outside their safe operating limits they can very rapidly become unstable. Quad Bike Safari