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      03-12-2017, 10:25 PM   #6
SerenVoX
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Drives: M235i Xdrive
Join Date: May 2016
Location: West Coast

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I ordered some wheels, 18x8.5 et42 front and 18x9.5 et45 rear.

Keep In mind I have Xdrive so Ive been told its important to keep rolling diameter below 2% between front and rear. With that being said it's been from research that I'll have no issues running 225/40/18 front and 255/35/18 rear.

Can anyone say if I can run bigger tires while staying below the 2% needed on staggered setup for xdrive? For example is 235/40/18 front ok with 255/35/18? Would it beneficial to just go with the 225/40 vs 235/40 front? Can I go bigger than 255 rear?

End goal is I want to run biggest/thickest tires with no rub on the wheel specs mentioned while not causing issue to xdrive.

Any feed back is appreciated.
Appreciate 1