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      05-18-2011, 08:43 PM   #3
Harplayr
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Drives: 2011 BMW X3 28i, F25
Join Date: Apr 2011
Location: Chicago

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Quote:
Originally Posted by Radioactive View Post
Lower profile sidewall will not help your situation. If you go to an 18" rim with lower sidewall depending of course on tire size, but comparing to X3 18" rim and tire, your overall tire and rim diameter will be about the same as the 17". You could put more "meat" on the road with >245 tread and 17" rim. Your ride quality with 18" low profile could diminish marginally, but susceptibility to the famous Chi Town potholes, good luck!
I would be sticking with the recommended tire profile for the 18 or 19 inch rims. I think it’s a 245/50-R18 that’s recommended.

What difference in handling, road feel, ride quality could I expect by going from the 245/55-R17 setup to the 245/50-R18?
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