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      10-07-2015, 08:21 AM   #3
SamS
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Drives: Tesla M3 Perf + '18 X3 M40i
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Quote:
Originally Posted by mkoesel View Post
Rolling radius is determined by the wheel radius plus sidewall height. So, for the 20" wheel, you just use a tire with less sidewall than the 19" wheel so that it has roughly the same rolling radius front to back.
And Mercedes making the 19/20" split available via the C63S. Gotta keep up with the competition!
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