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      01-11-2016, 08:57 PM   #1
DrMattN40
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big tires???

I am wondering if I could run 275/45/21 on the front and 315/40/21 on the rear of my M (215 style wheels). Stock runs 285/35/21 and 325/30/21. I'm looking for a thicker sidewall. Any experts out there please let me know what you think the potential issues would be. Thanks.
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      01-20-2016, 09:01 PM   #2
igorbmwx6
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Originally Posted by DrMattN40 View Post
I am wondering if I could run 275/45/21 on the front and 315/40/21 on the rear of my M (215 style wheels). Stock runs 285/35/21 and 325/30/21. I'm looking for a thicker sidewall. Any experts out there please let me know what you think the potential issues would be. Thanks.
I thought that E71 stock tires were 275/45/20 front and 315/35/20 rear?
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      01-21-2016, 12:17 AM   #3
DrMattN40
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Originally Posted by igorbmwx6 View Post
I thought that E71 stock tires were 275/45/20 front and 315/35/20 rear?
The 20's run 275/40 and 315/35... I am looking at running 275/45 and 315/40 for the 21 inch OE wheels. 275/40/21 and 315/35/21 would fit, but the combo doesn't exist, so the closest I have is 275/45/21 and 315/40/21 for the OE 21 wheels, which may be too big by a little for the front set up due to the control arms. The difference in radius from the stock to my proposed set up is 1.04 inches (1.04 inches closer to the control arms, which is damn close).
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