The 407 wheel was developed to endure the rigors of cross country/rally raid & desert races. Patented Bead Grip technology engages tire bead for increased grip at low tire pressures. Aggressive safety hump on bead seats further prevents de-beading. Reinforced inner lip taken from MRW race wheel increases strength. Solid A356 aluminum with T6 heat treatment construction. (Depending on the machine your stock lug nuts may not work with this wheel. They MAY require a different style lug nut that we offer.