12-29-2012, 02:39 PM
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#5
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Private
Drives: x3
Join Date: Jan 2012
Location: boston
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Quote:
Originally Posted by brissim
To answer your specfic question - there should be no problems in using 235/55/17s in place of 245/55/17s. There is only a 1.6% difference in tire overall diameter (27.6" for the OEM tire vs 27.2" for the replacement). Only issue will be your speedo will read 1.6% high - ie when speedo shows 60 mph, you actually will only be going approx 59 mph.
The alternative suggested by DC will also work. I know because thats the tire size I replaced my original OEM 245/55/17s with when I took delivery of our X3 over 12 months ago. For the 235/60/17s, tire diameter is 28.1" or 1.8% larger than the OEM size (in this case the speedo reads 1.8% low).
One other alternative which will let you keep the BMW OEM tire diameter is 225/60/17 (tire OD = 27.6").
Tony
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Thanks Tony
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