Hub Centric Rings, 73.1 to 66.6, Set of 4, ABS Plastic OD73.1–ID 66.56mm
TheHub Centric Ring is a ring made of plastic or aluminum to fill the gap between car hub and wheel center bore. if your car is with OEM wheel from the car manufacturer, you don’t need this. The car will have vibration issue when the speed is over 40-60mph no matter how you tight up the lug nuts.