Quote Originally Posted by snowtrooper1966 View Post
Greetings!
Just pondering as I was driving the Dragon today....
If the oversize Nitto tires (285/60/18) affect the speedometer reading, that is I am actually travelling faster than the dash indicates, how does that affect the mileage reading? Do I have less than is on the readout? I wonder what the culminative affect of that discrepancy is over the years?
Best,
The Great Goog answers all... http://www.miata.net/garage/tirecalc.html