rs4 rims on an A4

Hi,

I have a question for the experienced people out there. I wanted to know if the Stock RS4 wheel will fit an 2003 A4 Quattro W. sport supension. I want to get new rims for my ride but I don't know if I should go with 18 or 19 inch rims. I live in southern CA So I dont have to deal with alot of seasonal issues.

Thanks for all your help!

Might get a better response in the A4 subforum