Todays date is 3/8/2014
Calculate your Rear End Gear Ratio Needed
Back to Calculators
Gearing for the strip
To find the ideal gear ratio for drag racing use your RPM at peak HP.
Example: If your max HP is at 6300 RPM use 6300 for the RPM.
Gearing for cruising
To find the ideal gear ratio for cruising use your RPM at peak Torque.
Example: If your max Torque is at 3300 RPM use 3300 for the RPM.
Please Input The RPM,Tire Diameter and MPH