the radius arm 38 experience with single wheel steering shows that 85 degrees of arc of steering rotation provides the ability to achieve very sharp turns this is a great advantage to a vehicle in urban use wherein parking and general maneuvering may be available only to vehicles having extreme maneuvering capabilities also since the rear of such a vehicle will ordinarily be lighter than the front the present arrangement reduces steering effort by the driver the longitudinal member 40 connects to a pivoting member 54 which in turn moves a short longitudinal member 56 fore and aft the short longitudinal member 56 moves a rear radius arm 58 attached to a cylindrical housing 60 of the rear axle assembly 62 the pivoting member 54 has an elongate slot 66 surrounding a pin 68 connected to the longitudinal member 40 this arrangement permits operative interengagement of the longitudinal member 40 which moves linearly with the pivoting member 54 similarly accommodation of motion as the short longitudinal member 56 moves in all three planes while transferring steering inputs to the rear radius arm 58 is provided by two universal joints 70 located at the forward and rear ends 72 74 of the short longitudinal member 56 these universal joints 70 comprise ball bearing assemblies 76 fastened to plates 78 the ball bearing assemblies 76 having rotating axes 80 normal to one another obviously.