[eagle]

Originally Posted by BILL WILLIAMSON

Dog here,
Iffin' you measure the inches around the tire, convert 5,280 feet, into inches, DIVIDE the LITTLE number into the BIG number & it'll tell you how may turns it takes to run a MILE BUT, the centrifiugal force causes the tire to "grow", SO, the calculations are "out the window"--BACK to the "drawing" board OH CRAP, the battery in my CALCULATOR jist "DIED"
Buster T.

That's not all Bill. The tire patch that is on the ground compresses a bit, and the part NOT on the ground stretches. Very complicated formula. You need the get the specs from the tire manufacturer, then plug it all into a formula as long as your arm....and don't forget about slippage of the driven tire... OUCH! Yeah, makes my head hurt!