Gear Ratio and Performance Calculators

Take your vehicle to the next level

Performance Calculators

Find out what you need to get the job done!

While our Motive Gear tech support line is available during normal business hours, our calculators will help to get your dragster, funny car, street machine or off-road rig to the next level.

Contact Motive Gear tech support here. Or, call us at 800-934-2727 M-F 7-7 CST.



Enter your 1/4 mile race car's information into our calculator to see how well you will perform. Then, change Motive Gear ratios and beat your best time!

Access Drag Performance Calculator


This calculator will help your hot rod or street machine get to the next level without red-lining your engine. The Street Performance calculator is also handy when changing tire sizes on street rods.

Access Street Performance Calculator


Considering changing the size of your tires? Use this gear ratio calculator to see what ring & pinion gear ratio will be right for you after a tire size change.

Access Gear Ratio Calculator