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Online Gear Ratio Calculator
Looking for a quick gear calculation? Try our gear ratio and rollout calculator to find the right pinion and spur for your car, whether it's Team Associated, Tamiya, Traxxas, or any other make. Enter your car's internal drive ratio to see the final drive ratio (FDR), and see the percentage change in gearing you'll get from a new pinion and spur.
Gears & Ratios
Enter your gearing to see the how your ratio will change.
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Get our free Gear Calculator in Pit Calc Pro (link above), or try our RC AI Mechanic App for more setup help!
Want to calculate the top speed of your car? Try our Speed Calculator in Pit Calc Pro (link above)!
Change Impact Chart
Click/tap the gears to see how new gears will affect your ratio:
Negative changes indicate a steeper ratio: higher top speed, but more strain on the motor/engine. Positive changes give more acceleration and put less strain on the motor/engine.
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