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      01-14-2012, 11:01 AM   #3
Drives: 2008 e92 335xi
Join Date: Sep 2011
Location: Minneapolis

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Originally Posted by Cory1970 View Post
I need to put snow tires on my Type 162 (Front: 18x8 ET34 225/40 R18) (Rear: 18x8.5 ET37 255/35 R18).

2007 335xi, sport package, 6speed

According to Gary at TireRack I can run 225/40R18 all the way around. While I am sure he is correct and they will fit, will this damage my transfercase?

My thought is that the rear tire will be slightly stretched on the rim causing a difference in diameter between the front and rear wheel.

The rear tires will be slightly stretched, but it won't change the rolling diameter, only the width - which is good in this case since you want skinnier tires for snow.

FWIW I'm running 225/40/18 Dunlop 3Ds on 8.5' wheels. The tires look slightly stretched, but not too bad. Just have to be careful around curbs etc.
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