FTX Mighty Thunder Kanyon 15T Pinion Gear (1Pc) FTX8432 small motor transmission

Additional Information -

GRUB SCREW NOT SUPPLIED You need FTX123A M4 x 4mm

What the Pinion Gear Does

The pinion gear is fitted to the motor shaft and meshes with the spur gear inside the gearbox. Its tooth count directly affects the gear ratio, which changes how torque, speed, and efficiency are delivered to the drivetrain.

On the FTX Kanyon and FTX Mighty Thunder, pinion choice has a noticeable effect due to the fitted 2-speed transmission.

Stock and Optional Pinion Gears

Stock Pinion

• FTX8468 - 20 Tooth (20T)

• Supplied as standard

• Provides the highest top speed, especially noticeable in second gear

Optional Pinion Gears

• FTX6335 - 17 Tooth (17T)

  • Increased torque compared to stock

  • Slight reduction in top speed

  • Good balance for trail driving and mixed terrain

• FTX8432 - 15 Tooth (15T)

  • Maximum torque output

  • Best low-speed control

  • Lowest overall top speed

Performance Effects of Reducing Pinion Size

Reducing the number of teeth on the pinion gear (for example from 20T to 17T or 15T) results in:

• Increased torque at the wheels

• Improved crawling and hill-climbing ability

• Better low-speed throttle control

• Reduced load and stress on the motor and drivetrain

• Reduced overall top speed

• Longer run times, as the motor operates more efficiently and draws less current under load

The FTX8432 15T pinion is therefore ideal for crawling, technical terrain, and scale trail use where control, torque, and endurance are more important than outright speed.

Compatibility

• Fits FTX Kanyon

• Fits FTX Mighty Thunder

• Compatible with the standard 2-speed gearbox

• Direct replacement for the stock pinion gear

Fitting Notes

• Always reset and check gear mesh when changing pinion gears

• Ensure the pinion grub screw is properly tightened on the motor shaft flat

• After fitting, rotate the drivetrain by hand to confirm smooth operation

• Monitor motor temperature after the first few runs

Summary

• FTX8468 (20T)is the standard pinion gear

• FTX6335 (17T)offers a balanced increase in torque with a small speed reduction

• FTX8432 (15T)provides maximum torque, best control, and longer run times at the cost of top speed

• Fewer pinion teeth increase torque and efficiency while reducing overall speed