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As noted above, offset is probably the culprit here, not pressure. ET15 puts the wheel just over 1/2" closer to the fender than stock. You'd have to put stupid-high air pressure in the tire to change the shape very much, and even then it probably wouldn't be enough to matter.
Extra negative camber is probably your next step to try, unless you want drop the front size back to stock or modify fender/fender liner.
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I have accepted a new position at Tire Rack and am no longer in the sales department. gary@tirerack.com is available to assist with M3 questions. |