I got a set of Audi Q5 wheels with center bore of 66.6mm for my A8L 57.1mm bore. I didn't know about the differences until the tire shop told me when they put the wheels on. Driving without the rings were unbearable, like a stage coach, up and down and vibration at any speed. I ordered these and they do fit and help tremendously. They don't snug fit, they did fall out when I put the wheels up, but they work when everything is in place. Here is the video on youtube on how I put these on my Audi A8L with Q5 wheels.https://www.youtube.com/watch?v=mIQjJ0RL54k