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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! ?
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