Wheels spacers for a 04 A6 S-line?
 

Getting ready to lower and space the wheels for a more aggressive stance. I've found a few pics with 10mm spacers but thinking I might be able to fit 15mm. Do ya'll think that's a little too much and would they clear the fenders with the oem 18inch rs6 wheels and lowering springs? My apologies if this has been covered, I can't find it.