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Subject:Re: Need Help For Forthcoming Article
From:Frank Grunthaner
Date:Mon, 29 Jan 2001 14:41:25 EST

Derek,

I'm sure that you will have other opinions expressed, but I believe that the
static numbers that you are requesting are fraught with error. The real
number needed is the dynamic rolling number which is strongly related to the
tire construction detail, the inflation pressure and loading. Many
manufacturers publish these numbers as the "number of revolutions per mile".
The data is available from all manufacturers with an eMail to customer
service. Comparing tires from Michelin, Dunlop, Yokohama and Goodyear will
show similar static heights and static loaded radii with differing rev/mile
stats. The rev/mile number is generally given for a specific  inflation and
load. The manufacturer can often give a curve with revs/mile vs. load or
pressure.

Frank Grunthaner

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