In a message dated 3/21/05 11:32:17 PM, swright@ZUIKO.SLS.BC.CA writes:

<< I decided to measure the loaded radius of each of the tires I have on the
ground: >>

Measuring the static radius of a tire might be of very little import other
than in a relative manner.  The published rev/mile specification from the tire's
manufacturer is probably the best parameter to use in any comparative
calculations.  I would think that the maker's rev/mile specification is measured
according to an industry testing procedure while holding constant the other
variables which affect the measurement, such as speed, load, inflation pressure and
temperature.  The calculated rev/mile of the tire with the van sitting in the
drive could be vastly different from the rev/mile rolling down the boulevard
at 60 mph with a load of patio bricks in the cargo bay.

George