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      03-11-2016, 02:41 AM   #38
pikcachu
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Drives: M235i (F22 Red angel)
Join Date: Jul 2011
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Quote:
Originally Posted by gp_solo2 View Post
Pikcachu

I know it is streching a bit but I did ran about 10 year ago 225 wide on my 6 inches wide OE Miata wheel without any problem. Car was a lot lighter though.

Last year I ran 235/40/18 without issues. My only concern is that I lost on the acceleration side and I am pretty sure this is because of the taller sidewall increasing the overall gear ratio and the weight of the tire.

I know running 245 on a 7.5 inches wide wheel is not recommended and some bad thing may overide the benefits...this is why I am looking for real test data or comparaison. I want to get the max out of my F-Street setup. Dont know why BMW put 7.5 wheels on those car...would have been so much simple if they had put 8 inches wheels instead! ?
Oh I see, not sure what the weight difference would be from 225 to 235... can't think it would make much of a difference...

maybe it's the 10mm extra of diameter
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