Has anyone had experience fitting 16" wheels on a 2001 S4. There seems to be enough clearance for the diameter. It will likely come down to the outward face of the caliper that needs clearance. I wonder if any other OEM Audi/VW wheels will fit. The reason I'm asking is that I want to autocross my S4 and should be able to gain a good amount of acceleration by reducing the overal diameter of the tire/wheel combo. Not to mention reduing rotational mass by using a smaller diameter wheel.