Notes: The outside diameter of the spigot ring should fit the wheel\'s centerbore in the back of the wheel. The inside diameter is the size of the wheel hub on the vehicle you intend to fit the wheels to. Specification: Color: Blue Material: Aluminium Inner Diameter: (Vehicle Hub Size) 57.1mm Outer Diameter: (Wheel Bore Size) 72.6mm Depth: 10mm Ite..