Quote:
Originally Posted by snowbimmer
Yes, I'm going 255 front and 285 rear.......only 10mm wider per tire. But the front rim will gain an inch from 8" to 9". The rear rim will go from 9" to 10.5". They are 20" dia wheels.
The M8 runs a 275 on a 9.5" wheel in front and a 285 on a 10.5" wheel in back. The width isn't the problem. My question still remains about the new height vs OEM.
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Well, the new "height" (or revs per mile) will change the effective final drive ratio of the car. Your speedometer and odometer will no longer read the same as they did from the factory. Note, however, that German speedometers are deliberately calibrated to read slightly high. Your speedometer may well be slightly more accurate with the larger tires. (Edit: The change will, however, be tiny.)
I don't see a problem with your intended course of action, if -- and only if -- the wider rims don't rub on suspension components, fenders or wheel well. That's where the part about a cooperative and knowledgeable tire seller/shop comes in.