A steering system for a vehicle having a body supported on at least two sets of steerable wheels, generally consisting of a steering shaft provided with a wheel, supported on such body; a torque transmitting main shaft supported longitudinally on the body; means operatively interconnecting the steering shaft and the main shaft for transmitting rotary motion of the steering shaft to rotary motion of the main shaft; a first transversely displaceable means operatively interconnecting knuckle brackets of one of the sets of steerable wheels; a steering gear directly operatively interconnecting the main shaft and the first transversely displaceable means for translating rotary motion of the main shaft to linear motion of the first transversely displaceable means; second transversely displaceable means operatively interconnecting knuckle brackets of the other of the sets of steerable wheels; and a steering gear directly operatively interconnecting the main shaft and the second transversely displaceable means for translating rotary motion of the main shaft to linear motion of the second transversely displaceable means.