What offset are you guy's running on 18'' wheels? MY A3 2.0 TDI SPORT (2006) is currently on original 17's with an offset of ET56. Should i be looking at the same offset on 18'' wheels? Which offset can i safely use without the tyres/wheels rubbing on the car. I was told ET42 would be ok but then some say ET45 onwards only, what difference would it make to the handling of the car with a different offset? Also another thing that concerns me is the gap between the wheel and arch,going from 225 45 17 to 225 40 18's will there be any difference in the arch to wheel gap or is this just an optical illusion (as i was told ) ANY PICTURES WITH A3 (8P CHASSIS ONLY) ON 18'S APPRECIATED. PREFERBALY ON STANDARD SPORT SUSPENSION.