Acceptable Non-OE Tire Sizes for AWD?

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09-12-2013, 05:33 PM

#16

jumper5836

Nordschleife Master

Join Date: Mar 2004

Location: great white north

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Quote:

Originally Posted by powdrhound

I run the NT01s on 18x12 ET41 without any issues. I have also run them on 18x12 ET44 without any problems. Rear fenders are rolled. My friend now has my old ET44 wheels with 315/30/18 PS2s and has zero issues even though his fenders are not rolled.

ok thanks, looks like I need to find a set of 12". On 18x11 ET 45 the inner will rub on the inside fender liner and the guys were worried about it rubbing against the fender if it wasn't rolled.

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09-14-2013, 11:34 PM

#17

adam_

Burning Brakes

Join Date: Apr 2007

Location: N. California

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Quote:

Originally Posted by jpurban

I'm thinking of buying wider 9" front wheels and stepping up the tire width, but I know the AWD requires similar circumference on front & rear.

But what I don't know... What is the acceptable difference in circumference to avoid differential damage?

The stock 225/40-18 and 295/30-18 are within 0.5%.

245/35-18 and 295/30-18 are within 0.9%. Is this okay? Anyone run this set-up with AWD?

Thanks for the help.

I run 265/35-18 on 9" rims (and 315/30-18 on the rear) perfect fitment, in terms of revs per mile (ie OD)

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