Quote:
Originally Posted by MRV99
You may not have to adjust the front. You will have to adjust the profile of the tire. by looking at the std tire equation, the profile number is a percentage of the width. If the tire width gets smaller, you i will need a larger profile to make up the difference. Example. On my 545 I have 245/35/19 on the front and 275/30/19 on the front. different widths, different profiles, same size.
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That is the same setup I ran on the M3. Not sure about the 545, but going with a 285/30/19 in the rear was actually closer to the original ratios for the OEM M3 tires. Maintaining that ratio helps with the traction control system and not throwing off your speedometer.
I'm not saying I'll go with a 295 rear. I'm just trying to see what tire sizes people that run 20''s in the winter are utilizing. Basically a simple : I run 20''s in xxx/xx/20 in the front and xxx/xx/20 in the rear would suffice. Thanks.