4 pieces - Hubcentric Rings Aluminium Hub Centric Rings 63.4x73mm A set of Four Aluminium Hub Centric Rings. Removes vibration from non hub centric wheels on your car. A set of Four Polycarbonate Hub Centric Rings. Removes vibration from non hub centric wheels on your car. Hub size (Vehicle Side): 63.4mm to (Wheel Side): 73mm