Crown gear Z28 x 16.8 angular gear 11 degrees BLUE

The 11-degree anglewinder crown gear that fits your NSR pod or 3D chassis

The Sloting Plus Z28 x 16.8 Anglewinder 11° Blue Crown Gear (ref. SP072528) is designed for angled motor mounts where the gear operates at 11 degrees relative to the rear axle. A specification detail that makes the difference between a drivetrain that runs smoothly and one that vibrates and robs power.

Technical specifications

• Number of teeth: 28 (Z28)
• Diameter: 16.8 mm
• Width: 4.25 mm
• Gear angle: 11 degrees
• Axle diameter: 3/32 (2.38 mm)
• Weight: 0.6 g
• Colour: Blue

Function and performance

In an anglewinder drivetrain, the motor is positioned at an angle relative to the rear axle. For the pinion and crown teeth to mesh correctly without play or excessive tightness, the tooth cutting angle of the crown must match exactly with that of the pinion. This 11-degree crown ensures that precise fit, minimizing losses due to friction and reducing long-term wear.

With a weight of just 0.6 grams, the added inertia to the rear axle is minimal, promoting quick responses in acceleration and braking. The blue colour is not just aesthetic: it facilitates quick identification of the angle and tooth profile when you have multiple sets of crowns on the workbench.

Compatibility

This crown is especially suitable for:

• NSR triangular pods: the benchmark standard in competitive anglewinder chassis.
• SC RT4 pod: widely used among builders seeking a balance between lightness and rigidity.
• Closed-angle 3D chassis: most 3D-printed designs that adopt anglewinder geometry with a parallel axle to the motor assembly use this 11-degree angle.

The 3/32 (2.38 mm) axle is the most common diameter in competitive slot racing, compatible with the standard axles of these pods.

Assembly and preparation

Before mounting the crown, check that the motor pinion is also 11 degrees: mixing different angles generates noise, vibration, and accelerated wear. Once fitted onto the axle, check the backlash with the motor in position: there should be minimal play to ensure the gear does not bind when hot. Adjust the motor-axle distance until you achieve a smooth and quiet rotation.

If using axle adhesive, apply a minimal amount and prevent it from migrating to the crown teeth. A clean gear is the foundation of an efficient drivetrain.

Common mistakes

• Combining this 11° crown with a pinion of a different angle (for example, 15°). The result is a noisy gear with point contact instead of linear.
• Over-tightening the mounting point to the axle, which can deform the crown's alveolus and create eccentricity.
• Not cleaning the crown before mounting: traces of lubricant or dust interfere with the meshing and accelerate wear.

Frequently asked questions

What is the difference between an 11° anglewinder crown and a 15° one?

The angle of the teeth determines how they mesh with the motor pinion. An 11° crown is designed for mounts where the motor forms a tighter angle parallel to the axle, typical of NSR triangular pods and modern 3D chassis. A 15° crown corresponds to wider angles. It is essential that the crown and pinion share the same angle to ensure correct meshing.

Is it compatible with all anglewinder chassis on the market?

It is compatible with pods and chassis that use the 11-degree angle and 3/32 (2.38 mm) axle. The specification confirms compatibility with NSR triangular pods, the SC RT4 pod, and most 3D chassis designed with that angle. For other chassis, check the design angle before purchasing.

Can I also use it in a sidewinder or inline configuration?

No. This crown is specifically designed for anglewinder. In a sidewinder or inline setup, the pinion axle is parallel or perpendicular to the rear axle, and crowns with straight or helical tooth profiles, not angular, are needed.

What pinion should I use with this crown?

An 11-degree anglewinder pinion and axle compatible with the motor axle you are using. The number of teeth on the pinion determines the gear ratio along with the 28 teeth of this crown. Adjust that ratio according to the motor, circuit length, and type of competition.

Does the blue colour have any effect on performance?

No, it does not affect performance. The colour serves to visually identify the angle and tooth profile of the crown within a set of spares, especially useful when working with crowns of different angles or tooth profiles on the same workbench.

The Sloting Plus SP072528 is a Z28 anglewinder crown gear with a 16.8 mm diameter, 4.25 mm width, 11-degree tooth angle, and 3/32 (2.38 mm) axle. Weighing just 0.6 g, it delivers a clean, low-inertia drivetrain for anglewinder slot car setups. Compatible with NSR triangular pods, SC RT4 pods, and most 3D-printed anglewinder chassis designs. An essential upgrade for club racers and competitive slot car builders looking for precise gear mesh and consistent power transfer.