Just spotted this message - sorry for delay.

Wheels were OEM 20" Audi. You should be able to do the same with the 18s you have.

Jayzee,

I noticed a picture of your 2002 Aqua Blue S8 on a thread dated Feb 17th, 2011. The car looks great. I have a 2003 Ming blue S8 and read that you had used spacers on the front and rear wheels. Question, are those OEM 18 inch rims? if not, where did you find the rims and what size are they. They fill out the wheel wells extremely well. Thanks for your time.