> What is the best way to figure out the
> revolutions per mile?

I've fount that that odometer is pretty darned close. When that final tenths
zero comes down level, that mileage times 805 is nearly exact... like +/- 2
revs/mile close

And regarding the manufacturers numbers vs calculated, My latest data
samples convince me to throw in with the manufacturer's numbers. Really, my
suspicions were based (unreasonably) on the crap tires on my wife's car, for
which I found very odd numbers. My GPS/odometer calculation from these
Hankook RF10's I have now comes out to 729, and their book number is 731.
Pure calculated number is 710. Book number wins.

--
John Bange