Todays date is 3/30/2015
Calculate your Rear End Gear Ratio Needed
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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