Eliminate vibration, excessive bearing wear, and possible structural failure of lugs caused by Non Hub Centric Wheels. Hub Ring Internal Diameter (ID) (Match to Vehicle Hub Diameter) : 121.30mm Hub Ring Outer Diameter (OD) (Match to Wheel Center Bore Diameter) : 130.80mm Precision manufactured to provide a perfectly sized fit . Tough, corrosion resistant and is able to withstand harsh temperatures Chamfered edges provide for easier installation while making sure they match the wheel center bore seat profile Wheel Accessories Parts set of 4 Hub Centric Ring 130.80mm OD To 121.30mm Hub ID, Polycarbonate (Wheel Hub Ring, 4 Pack, 130.80 mm OD to 121.30 mm ID Wheel Centerbore, Polycarbonate)