A hub for use in and as part of a wheel support assembly adapted to bolt to the end plate of an axle of a vehicle for supporting a tire is disclosed herein along with the wheel support assembly itself. The hub is configured as a plurality of bars which are connected together to form a hub body. This hub body defines a common center point and a contact face. The contact face is where the hub is in contact with the axle end plate when the device is mounted to a vehicle. Each of the bars has on one side a contact surface, and a through hole for receiving an axle lug bolt. The contact surface on each of the bars has a curved shape on its outwardly most extending end, the curvature of which is defined by a radius less than the distance between the common center point of the hub body and the outwardly most extending end of the bars.