A wheel suspension system for a vehicle includes a mounting base and a striking base spaced from each other and moveable relative to each other along an arced line of motion. An insulator is coupled to and extends from the mounting base. The insulator is formed of an elastomeric material for compression between the mounting base and the striking base when the striking base contacts the insulator during movement of the mounting base and the striking base relative to each other. The insulator is compressed along the arced line of motion between the mounting base and the striking base. The insulator includes an impact portion extending at an acute angle relative to the base plane for distributing compressive forces within the insulator as the insulator is compressed along the arced line of motion. The distribution of the compressive forces within the insulator increases the durability and reliability of the insulator.