Abstract: A suspension having each rear axle interconnected with a trunnion journaled in a crossbeam so that each wheel is rotatable about a horizontal axis extending at right angles to the wheel axle. A control link connects the trunnions such that rotation of one effects a corresponding rotation of the other and in the same direction. A double acting spring acts on the link resisting longitudinal movement of the link in either direction. The spring action is of predetermined character for providing the optimal relationship with respect to a self-centering force, camber rate and bump camber resistance.