I Never Knew or Expected My Koning Oversteer Wheels Would Need These Set Of Hub Rings But They Did. Without Them The Wheel Hub Center Bore Area Had Way Too Much Space Left In It and Would Have Caused It To Vibrate While Driving/riding Down The Road. The Hubcentric Rings Fit Perfectly and Didn't Cost Alot of Money and Where Delivered Within Days - Thanks Again Revain.com!