[Excaliber]

I have YET to find an auto math calculator site I like!!! Why is it you can get DIFFERENT answers using the same equation with different calculators from different sites??!! AHhgrgghhddd,,,,,I'm steamed!

Heres an equation that sounds "promising" however!
Draw a line on your tire, draw a mathcing line on the ground. Roll your car ahead until the line on the tire has made a full turn. Draw a second line on the ground to match the tire line. Divide by "pi" 3.14. This is the size of the tire in inches, at REST, you HAVE to figure SOME growth rate I'm sure (uh,,,,,I think I'm sure)!

Thanks to Archimedes for figuring out "Pi" a couple thousand years ago.

Ernie