<VV> Tire gurus

[BobHelt at aol.com]

In a message dated 3/27/05 9:03:36 AM US Mountain Standard Time, 
airvair at richnet.net writes:

> BTW if you look on the speedo housing label on a late model, it will see 
> that it is labeled as factory-rated for 825 revolutions per mile, which 
> translates into a rolling diameter of 24.44 inches. Just try to find a 
> 185/80R-13 tire listed as having THAT rolling diameter! (And FYI, I once 
> checked an authentic set of 7.00-13's for rolling diameter, and they 
> came within just a few feet of being dead-on in a measured 5 miles. Sure 
> must have been a true 24.44 inches in rolling diameter.)
> 
Mark,
I fully agree on the physical appearance of the 7.00s looking larger, but as 
I said the actual specs show nearly identical revs per mile for these two 
tires. (You're goinging to argue with the specs?)  

Also you and I both know that Chevrolet, like all other 1960s car 
manufacturers, designed their speedometers to read fast. So the 825 can't be used for a 
true speed representation. Revs per mile is the only true way to show 
equivalency.
Regards,
Bob Helt