Because 8x18ET35 does most probably need up to 8mm thick rim spacers per wheel for inner rim horn and/or inner tyre shoulder clearance, ET33 thus would be beneficial. By adjusting the final offset to about 30 to 28, 205/35, 215/35 or 225/35 tyres will fit nicely without “hurting” the non-modded arches (if no lowering is intended).