MPH

RPM
Rear Axle Gear ratio (i.e., 3.00, 3.50, etc.)
Transmission Gear ratio (i.e., 2.54, 1.43, 1.00, etc.)
Tire diameter in inches (24.5, 26, 27.5, etc.)



The speed in MPH is miles per hour.

The same tire and RPM will give the following speeds based
on the following Falcon gear ratio's

 
2.79 2.83 3.00 3.25 3.50 3.89 4.11 4.57