Quote:
Originally Posted by pungo
You did not keep the same diameter by going from a 245 to a 255, the 255 is taller, that's where you went wrong. Just sayin... The tire shop should not have even put them on with different diameters.
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Completely agree. The tire shop should have informed you that the overall wheel diameter and circumference changes. FYI the "40" is not a measurement unit, it refers to the sidewall being 40% of what the width (i.e. 245mm or 255mm) is. The sidewalls are higher on 255/40 than on 245/40, so now your front wheels and rear wheels have different circumference which will interfere with the xdrive, as front and rear are moving at different speeds.