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      01-14-2019, 06:10 PM   #19
Viper7
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Drives: 2014 F80 M3 Mineral Grey
Join Date: Jun 2017
Location: New Zealand

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I've got a question for all you wheel and tire gurus.

I want to go with 21" wheels but stick with the PS4S tires, rather than go back to PSS's.

That means I'll probably stick with a 275 tire on the front (same as OE width), but go to a wider 295 on the rear (given there is no 285/30/21 size for the PS4S).

Does this present any issues for the 4WD system etc? Since I've gone one size wider at the rear but stuck with OE at the front, and the diameter of the new tire combination is a slightly bigger difference between front and rear?

Anyone upgraded to the below sizes and have any feedback?

F:
21 x 9.5
275-30-21 Michelin PS4S

R:
21 x 11
295-30-21 Michelin PS4S
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