SW 31d crown gear

The Thunderslot SW 31d Crown Gear: Reliable Transmission for Your Sidewinder Setup

When the transmission fails, the rest of the preparation work is pointless. This 31-tooth crown gear from Thunderslot is made of nylon and specifically designed for sidewinder configurations —motor parallel to the rear axle— offering a smooth and durable engagement with the corresponding pinion.

Main Features

• Teeth: 31
• Diameter: 17 mm
• Material: nylon
• Colour: blue
• Configuration: sidewinder (transverse motor, parallel to the rear axle)
• Brand: Thunderslot
• Reference: TH-GE31SWP

Function and Performance

Nylon is a widely used material in slot crown gears due to its lightweight, ability to absorb small imperfections in the engagement, and low noise level during operation. With 31 teeth and a diameter of 17 mm, this crown gear offers a balanced gear ratio, suitable for both club use and recreational running.

The blue colour facilitates quick identification among different crown gear references when working with multiple gear sets, which is very useful on the preparation bench.

Compatibility and Installation

This crown gear is designed for sidewinder setups within the Thunderslot range. Before installation, ensure that your motor's pinion is compatible in module and that the rear axle allows for the correct adjustment. A precise alignment between pinion and crown gear is key to reducing wear and avoiding vibrations during the race.

If you change the gear ratio from the car's original configuration, remember that a crown gear with more teeth reduces top speed but improves acceleration from low speeds, and vice versa. Adjust according to the type of track and your driving preferences.

Common Mistakes

• Installing the crown gear without checking the lateral play of the axle: excessive play generates vibration and premature wear.
• Not checking the pinion-crown alignment before closing the chassis: poor parallelism causes noise and loss of efficiency.
• Forcing the fit when cold: nylon tolerates work well, but excessive tightening can deform the teeth.

Ideal for…

Drivers competing with Thunderslot cars in sidewinder configuration who need an original transmission spare, whether for routine maintenance or to experiment with different gear ratios according to the circuit.

Frequently Asked Questions

Is this crown gear compatible with chassis from other brands?

It is designed for the Thunderslot range. It may be compatible with other sidewinder chassis that share the same gear module and axle diameter, but we recommend verifying this before installation.

What is the difference between a nylon crown gear and one made of aluminium or brass?

Nylon is lighter and quieter, and better absorbs small irregularities in the engagement. Metal crown gears offer greater rigidity and dimensional precision but are more sensitive to perfect alignment. For club or recreational use, nylon is a very practical option.

How do I know which gear ratio is suitable for me?

It depends on the track and the motor. On long tracks with long straights, higher top speed is usually sought (fewer teeth on the crown gear or more on the pinion). In technical circuits with many curves, acceleration is prioritised with crown gears that have more teeth. Test and adjust according to your feelings on the track.

Which pinion should I pair with this crown gear?

Thunderslot specifies compatible pinions according to the crown gear module. Consult the manufacturer's technical sheet or the Thunderslot catalogue to ensure that the pinion module matches that of this 31-tooth crown gear.

The Thunderslot SW 31-tooth nylon crown gear (ref. TH-GE31SWP) is a purpose-built replacement part for sidewinder slot car setups. With a 17 mm diameter and blue colour coding for easy identification, it delivers smooth and reliable power transmission. A must-have spare for Thunderslot slot car maintenance and gear ratio tuning.