Abstract: This vehicle includes a steering system, which is adaptable for use with self-propelled and trailer vehicles to provide a compact, low-profile carrier for both personnel and cargo, and is mounted to the vehicle to ensure a floor and fender system providing optimum carrying capacity. The steering system controls all four wheel units and includes an actuating member mounted to the vehicle body and actuating the wheel units by a swiveling system. The swiveling system incorporates an intermediate rotating mechanism mounted to the body adjacent each wheel unit and within the fender wells, and permits effective swiveling of the wheel units by swiveling system elements located below the floor system and within the fender wells.