TREMEC GEAR CALCULATOR: Use the Speed Calculator below to compare TREMEC to your current transmission.

Pick Your American Powertain Transmission

Enter your desired RPM for racing or cruising here.

Enter your rear axle ratio here.

Enter your tire height here. Use the Tire Height Calculator below if you don’t know your tire height.

The estimated speed you will be traveling based on the parameters you established and the transmission you selected.

Ratio MPH
1st Gear
2nd Gear
3rd Gear
4th Gear
5th Gear
6th Gear

TREMEC TIRE SIZE CALCULATOR: Find out what your tire height is, using this calculator.

Calculate Your Tire Diameter

Enter the tire width in millimeters, the aspect ratio, the wheel diameter in inches, and Click on Calculate...

Tire Width (mm)
Wheel Diameter (in)
Aspect Ratio (1-100)

Tire Height (in)
Tire Width (in)