[2000BEAST]

Hi Luke - I have always wondered ...

Given two tires with the same size (example: 285 35 18) one manufactured by Pirelli, and one manufactured by Goodyear, how much "variation" (+/-) is allowed in the industry product standard in terms of Width, Heigth, and Circumference ?

I know that different treads will "look" different (example PS-2 look "skinnier" that a Nitto NT555).
What I am really asking is, what is the acceptable product variation for all three dimensions, or is there any measurable allowable variation at all ?

 

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the measurement (225/45-17 for example) is based on the inner carcass of the tire and different constuction techniques used by companies can and di vary the dimensions of the finished product greatly ... there is no industry standard that I know of