Quote:
Originally Posted by cdmulders
Yes, indeed, but what I do not know is the stock size for a 535GT. It might be 245/45/19 as OP mentioned for his front tires and therefore, his tire sizes already have a greater diameter than an F10. In that case, going up one size to 245/50/19 for his car would have the same effect as what I did with my winter tires for an F10. I could just as easily have increased my summer tires to 245/45/19 vice the 245/40/19 that came with my car. As an aside, OP, stock tire sizes for F10 are 245/40/19 or 245/45/18 (square setup).
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Indeed, the specs in the original post are the standard for the 550i GT:
245/45/19
275/40/19
I would be going one step up, just as you did. Are you happy with the result? And do you have an explanation as to why the speedometer corrected itself while it should have become more incorrect, if anything?