Abstract: Provided is an apparatus for mounting a wheel bearing axle suspension to a vehicle comprising a rigid sub-frame to which the wheel bearing axle suspension is attached, a runway on which the sub-frame may slide in a direction at right angles to the longitudinal axis of the axle, stop means which limit the distance of travel of the sub-frame on the runway, a horizontal turn-table bed plate to which the runway is attached, a horizontal turn-table top-plate fixedly attached to the vehicle and in which the bed plate may concentrically rotate, the stop means being such that when the vehicle is travelling forward, the sub-frame assumes a position in which the vertical plane which contains the longitudinal axis of the axle trails the vertical axis of the bed plate and top plate and is forward of the vertical axis when the vehicle travels in reverse.