RC Car Gear Ratio Calculator
Calculate gear ratios for your RC car including basic ratio and final drive ratio
How to Use
Understanding Gear Ratios
Basic Gear Ratio
The basic gear ratio is calculated using the number of teeth on the spur and pinion gears.
Ratio = Spur Teeth ÷ Pinion Teeth
Final Drive Ratio
The final drive ratio includes the internal transmission and differential ratios.
FDR = Basic Ratio × Internal × Differential
Required Information
- Spur Gear Teeth:
The number of teeth on your RC car's spur gear (the larger gear attached to the clutch bell).
- Pinion Gear Teeth:
The number of teeth on your RC car's pinion gear (the smaller gear attached to the motor).
Optional Information
- Internal Gear Ratio:
The fixed internal transmission ratio of your RC car, if applicable. This information is usually provided in your vehicle's manual.
- Differential Ratio:
The gear ratio of your RC car's differential, if applicable. This is also usually found in your vehicle's manual.
Important Notes
Higher gear ratios provide more torque but reduce top speed, ideal for climbing and crawling.
Lower gear ratios increase top speed but reduce torque, better for racing on flat surfaces.
Always ensure proper gear mesh and consider your motor's specifications when selecting gear ratios.