Wheel has 3.5 inch backspacing with a 60 degree conical seat lug & 108.46 millimeter center bore. It is constructed of 2 piece welded steel construction. It weighs 3050 pound load capacity & center cap is not included. Each Dexstar wheel is e-coated prior to going through a state-of-the art powder coat system, all of which is done in-house.