Agreed, Mr. Taz.

ReRiseAngel:

Suggest you go no larger than 235/40R18 on the fronts. Even this tire will rub against the rear-ward fender well, but not excessively, at full turn lock. Any fatter or taller and you'll have a problem. But if you insist, drop the aspect ratio to 35 and never ever make any U-turns.

As for the rears, go as fat and tall as you think your installer is willing to handle ... and watch the pot holes ... but why would any one want to lower the car and get it all gangstered up any way?