Hub Centric Rings
Centering Rings are used when the center bore of the wheel is larger than the wheel hub on your car. If the center bore of your wheel is larger than the wheel hub then without Hub Centric Rings the wheels are lug centric. Hub Centric Rings are recommended for wheels when taking the car to the track. The Centering Rings alleviate some of the stress on the lugs.
PTS offers several sizes of aluminum Hub Centric Rings - $25 for a set of 4.
If ordered with a set of wheels there is no added shipping cost