Tire Size Mpg Calculator
Tire Size Mpg Calculator . Immediately available tire sizes that are with in plus or minus 3% variance will be displayed. Rpm = (mph x rear end ratio x 336) / tire diameter. tire size vs. gear ratio? Ford Truck Enthusiasts Forums from www.ford-trucks.com Not to be used in place of real testing. Fill in the fields below to calculate the cost of low tire pressure, and figure out just how much you can save. Calculate gear, rpm, mph, tire diameter calculate gear, rpm, mph, tire diameter.