Quote:
Originally Posted by Endgame
Does anyone know? I never understood why the factory spec is 40 in front, 35 rear.
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Profile is relative to the width of the tire, i.e. it is the height of the sidewall expressed as a percentage of the width. Given that the Z has a staggered width but not a staggered diameter the profiles will be different.
More or less you can just ignore the profile and instead look at the tire diameter and revolutions per mile. The goal is to have these numbers as close as possible to each other and close to stock.