Balanced 3/32 Crown Gear 24 InLine

A crown designed to maximise every millimetre of the inline setup

The NSR 24 InLine 3/32 balanced Crown (reference NSR6324EVO) is one of the key components in the transmission of any slot car with an inline configuration, meaning the motor is arranged longitudinally, in line with the rear axle. This design lowers the car's centre of gravity and demands transmission components with extremely tight tolerances, exactly what this crown offers.

Features and function

• 24 teeth: a very commonly used gear ratio in competition to balance acceleration and top speed.
• Inline configuration: specifically designed for setups where the motor is positioned in line with the rear axle, longitudinally.
• 3/32 axle: fits onto axles with a diameter of 3/32", the most widely used standard in 1/32 scale slot racing.
• Ultralight aluminium centre: the aluminium hub reduces rotating mass, improving acceleration and braking response, and contributes to lower inertia on the axle.
• Factory balanced: balancing is crucial in competition crowns. An unbalanced crown generates vibrations that lead to loss of grip, premature wear of pinions, and erratic behaviour in corners.

Applications and compatibilities

This crown is designed for cars with an inline configuration: the motor is positioned longitudinally relative to the rear axle, unlike the sidewinder (transverse motor) or anglewinder (angled motor). NSR is precisely one of the leading brands in this type of setup, and its EVO range of crowns represents the most refined evolution of its transmission catalogue.

The 3/32 pitch makes it compatible with the vast majority of competition motor pinions available in the 1/32 slot market. Always check the total gear ratio (crown/pinion) before selecting tooth count to adjust the behaviour to your track and driving style.

Installation and preparation

As a balanced crown, it should not require additional manual balancing work under normal conditions. Nevertheless, before installing it, it is advisable to:

1. Check that the axle is perfectly straight and clean.
2. Verify alignment with the motor pinion to avoid premature wear.
3. Adjust the play between crown and pinion: neither too tight (friction and heat) nor too loose (jumping and noise).
4. Lightly lubricate the contact point with a specific slot gear lubricant.

Common mistakes

One of the most common mistakes when working with aluminium crowns is over-tightening the fixing screw. Aluminium is a softer material compared to the steel of the axle, and excessive tightening can deform the hub and compromise the balance. Always use the appropriate tool and apply the correct torque.

Another frequent mistake is mixing tooth counts without recalculating the total gear ratio. A change of pinion or crown directly affects the car's behaviour on track: more teeth on the crown = higher top speed, less acceleration; fewer teeth = better start, lower maximum speed.

Frequently asked questions

What is the difference between a balanced crown and an unbalanced one?

A balanced crown has its mass distributed evenly around the axis of rotation. This eliminates vibrations caused by imbalances, resulting in greater stability on track, better tyre contact with the surface, and less wear on the transmission assembly.

Is this crown compatible with sidewinder or anglewinder motors?

No. This crown is specifically designed for inline configurations, where the motor is mounted in line with the rear axle. For sidewinder or anglewinder setups, there are other references in the NSR catalogue.

What type of pinion is it designed for?

Being 3/32 pitch, it is compatible with motor pinions of the same pitch. Always check that the tooth module is compatible between crown and pinion to avoid poor meshing.

Can I use it on club tracks or only for recreational use?

It is a component clearly aimed at competition and the technical preparation of cars. It works just as well in advanced recreational use, but the one who will really benefit is the driver who fine-tunes their car for club championships or organised competition.

How long does an aluminium crown last compared to a plastic one?

Aluminium crowns are more resistant to heat and deformation, although under intensive use conditions, the tooth profile may wear out faster than on steel crowns. The advantage of the aluminium crown is its lighter weight and better balance, which are priority factors in competition.

The NSR6324EVO is a 24-tooth inline crown gear for 3/32 axle, featuring an ultralight aluminum hub and factory-balanced construction. Designed for inline motor configurations in 1/32 slot car racing, it ensures smooth, vibration-free power transmission and precise engagement with motor pinions. A go-to upgrade for club racers and competitive slot car builders looking to optimize drivetrain efficiency and consistency on track.