RC-GEAR vs RC Gear Calculator Pro Utilisation & Stats
The calculation of the final drive ratio of the RC car is...
[No. of spur gears x No. of Pinion gears x Secondary gear ratio]
You can calculate with the above.
It is very troublesome to calculate every time, so I developed this application which can be used offline.
When set to low gear (high numerical value),
- Acceleration (rise) is fast.
- The maximum speed does not increase.
- The motor load reduces.
- The running time of the batteries will be longer.
When set to high gear (low numerical value),
- Acceleration (rise) is slow.
- The maximum speed increases.
- The motor load increases.
- The running time of the batteries will be shorter.
However, please note that some motors and ESC have their own recommended gear ratios.
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Easily calculate your gear ratio, final drive ratio, or rollout. Enter your gears "before and after" to see the real impact of your gear and tire changes. See the impact as a percentage (e.g. +2.5%), so you'll know how much speed and load on the motor to expect. Great for all types of RC racing and bashing, including on-road, off-road, oval, drift, speed runs, and more.
Aside from the primary ratio (spur:pinion), you can also see your Final Drive Ratio (useful for all cars, but definitely for touring cars) and Rollout (useful for cars with foam tires such as pan cars, F1, oval, and 1/28 scale.)
FEATURES
- Enter current gears and new gears to see both ratios and the percentage change
- Enter internal ratio to get the before-and-after Final Drive Ratio (FDR)
- Internal ratio for hundreds of cars built-in and updated regularly
- Enter before-and-after tire radius to get changes in rollout
- App remembers your entries, so you don’t need to retype them every time
- Detailed Help page describing ratios and how to use them
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- Utilitaires
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RC-GEAR VS. 
RC Gear Calculator Projanvier 12, 2025