MPH Calculator

 
 

MPH CALCULATOR
 

RPM:

Rear Axle Gear Ratio:

   (i.e., 3.08, 3.55, 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
The same tire and RPM will give the following speeds based on the following gear ratio changes.
2.59 2.73 3.08 3.36 3.55 3.70 4.11 4.56