A wheel assembly (10) is disclosed, including a wheel base (14) and a wheel rim member (16). The wheel base (14) has along at least a portion of its length a non-circular cross sectional outer surface (86). The wheel rim member (16) has along at least a portion of its length a mating non-circular cross sectional inner surface (88). The inner surface (88) of the wheel rim member (16) interacts with the outer surface (86) of the wheel base (14) to restrict relative rotation of the wheel rim member (16) on the wheel base (14).