27z angled crown gear

A 27-tooth angle crown gear designed for those who leave nothing to chance

The 27z Angle Crown (ref. AV20653) from Avant Slot is a transmission spare part specifically designed for anglewinder configurations, where the motor is positioned at an angle to the rear axle. With 27 teeth, a diameter of 16 mm, and made for a 2.38 mm axle, it offers a clean and efficient transmission that is noticeable from the first lap.

Technical specifications

• Number of teeth: 27z
• Diameter: 16 mm
• Compatible axle: 2.38 mm
• Fixing system: M2 screw (included in the pack)
• Configuration: for anglewinder mounting
• Brand: Avant Slot
• Reference: AV20653

Function and performance

In an anglewinder transmission, the crown gear is the component that receives the motion from the motor pinion and transfers it to the rear axle. A well-fitted crown reduces play, improves acceleration response, and extends the lifespan of the assembly. The fixing with an M2 screw ensures that the crown remains securely attached to the axle without unwanted movement under load.

With 27 teeth, this crown is commonly paired with pinions ranging from 9 to 12 teeth, offering gear ratios that balance top speed and torque according to the circuit and driving style.

Installation and preparation

Installation is straightforward: the crown is placed on the rear axle, aligned with the motor pinion, and secured with the included M2 screw. It is advisable to check the play between the pinion and crown before tightening it definitively; a small gap — barely perceptible — is sufficient for smooth and quiet transmission operation. Excessive tightening or poor alignment can cause vibrations and premature wear.

Compatibility

This crown is designed for Avant Slot chassis that use a 2.38 mm axle in anglewinder configuration. Before placing an order, confirm that your chassis works with this axle diameter and that the wheelbase of your car accommodates a crown with a 16 mm diameter to avoid contact with the body or chassis.

Common mistakes

• Confusing axle diameter: there are crowns for 2.38 mm and for 3 mm; always check your car's axle before purchasing.
• Not checking pinion-crown play: a too-tight adjustment generates heat and wear; too loose, it results in power loss and skipping.
• Tightening the M2 screw dry: a small drop of low-strength thread lock helps prevent loosening without hindering future disassembly.

Frequently asked questions

Is this crown suitable for any motor configuration?

No. As an angle crown, it is designed for anglewinder setups, where the motor is positioned at an angle to the rear axle. It is not the right part for inline or sidewinder configurations.

Is the M2 screw included?

Yes, Avant Slot includes the necessary M2 screw for fixing along with the crown.

What pinions are commonly paired with it?

It depends on the gear ratio you are looking for. It is most common to pair a 27-tooth crown with pinions from 9 to 12 teeth. A shorter ratio (smaller pinion) favours acceleration; a longer ratio (larger pinion) increases top speed.

Can I use this crown on a 3 mm axle?

No. This reference is designed for a 2.38 mm axle. For 3 mm axles, you should consult the corresponding reference from the Avant Slot catalogue.

When should I replace the crown?

When unusual vibrations in the transmission, metallic noise, or visible wear on the tooth flanks appear. Regular inspection of the transmission system is part of the basic maintenance of any competition slot car.

The Avant Slot AV20653 is a 27-tooth anglewinder crown gear for 2.38 mm axles, featuring a 16 mm diameter and M2 screw fixing. An essential slot car spare part for anglewinder setups, combining precise transmission with easy installation. Compatible with Avant Slot chassis designed for 2.38 mm rear axles.