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      10-24-2012, 11:03 PM   #8
slicer
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Drives: '13 E92 M3
Join Date: Jan 2009
Location: San Diego, CA

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9.4 et 34 is too conservative. 9.5 et 20 is aggressive but it will work. You will need to add some camber in the front to make it look good with 275/30's in the front. 255/35's will be stretched on 9.5" wheels but they will work and you might not need to add camber. I'm not a big fan of 265/30 because the sidewall is smaller than I would want. I would go with the 9.5 et20 wheels with 275/30 tires and have the camber adjusted front and rear. I would run 295/30 in the rear but you may have some slight rubbing. See the link I posted earlier to see what people have done to deal with the rub.
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'13 E92 M3 - Alpine White - 1 Option (DCT), Ohlins TTX, AP Racing, Cobra Seats, Akrapovic GT4, BBS RI-A, M3 GTS - Steering Wheel, Aero, 1/2 Cage, Seat Delete