Duh!!!

Use the tire revs per mile specified by the tire manufacturer. Most tires of a given size are usually within one percent, so you can use nearly any manufacturer's data for a given size.

Computing the revs per mile from static dimensions will not yield accurate results because tires are not rigid bodies.

Actual loaded revs per mile figures are usually about 2-3 percent greater than the rigid body calculation using inflated OD.

Why use the inflated OD to calculate a revs per mile figure that will be inaccurate when manufacturers specify actual loaded revs per mile based on testing?

Did I say Duhhhhhhhhh!!!

Pneumatic car tires do not behave the same as steel railroad wheels.

And just in case you didn't notice, this thread is six months old.

How about another Du...!

Duke