30z angled crown gear

30-Tooth Angle Crown Gear for 2.38 mm Axle with M2 Screw Fixing

The 30z Angle Crown (AV20656) from Avant Slot is a transmission component specifically designed for anglewinder setups, where the motor is positioned at an angle relative to the rear axle. With 30 teeth and a diameter of 16 mm, it offers a suitable gear ratio for multiple pinion combinations, both for recreational use and club competition preparations.

Technical Specifications

• Number of Teeth: 30z
• Diameter: 16 mm
• Compatible with Axle: 2.38 mm
• Fixing System: M2 screw (included)
• Mounting Type: anglewinder
• Reference: AV20656
• Brand: Avant Slot

Function and Performance

The crown gear is the final link in the transmission chain: it receives the motion from the pinion coupled to the motor and transfers it to the rear axle to drive the wheels. In an anglewinder setup, the correct choice of the number of teeth on the crown—combined with the teeth of the pinion—determines the overall gear ratio, and with it, the top speed and acceleration response of the car.

With 30 teeth, this crown allows for moderate gear ratios that balance acceleration and top speed, particularly useful on technical tracks with medium curves and long straights.

Compatibility and Installation

It is designed for 2.38 mm axles, the most common diameter in the world of 1/32 scale slot racing. The M2 screw fixing—included in the pack—ensures a firm and play-free fit that maintains correct alignment throughout the session. It is important to check the crown-pinion alignment before closing the chassis to avoid premature wear and transmission noise.

Installation and Preparation: Practical Tips

• Ensure the crown is centred relative to the pinion before tightening the M2 screw.
• Apply a minimal amount of specific gear grease to the teeth to prolong the life of the crown and pinion.
• Check the backlash between the crown and pinion: it should be minimal but sufficient to prevent hard rubbing or locking.
• If you change the gear ratio, remember to adjust the motor position if the chassis allows.

Common Mistakes

• Over-tightening the M2 screw: this can deform the crown or damage the axle. Adjust firmly, but do not exceed the torque.
• Using the crown without lubrication: increases wear and generates noise. Always apply a small amount of grease.
• Mixing angle crowns with inline or sidewinder pinions: the angles of the teeth are not always interchangeable between configurations. Use specific pinions for anglewinder.

Frequently Asked Questions

Is this crown compatible with any 1/32 scale anglewinder chassis?

As long as the rear axle is 2.38 mm—the most common standard in 1/32—the crown will fit correctly. Check that the 16 mm diameter does not interfere with the chassis or body before installation.

What pinion should I use with this 30-tooth crown?

It depends on the gear ratio you are looking for and the motor you are using. Pinions between 8 and 12 teeth are the most common in combination with 30z crowns in anglewinder configuration. A 10z pinion with this 30z crown gives a 3:1 ratio, balanced for most circuits.

Is the M2 screw included?

Yes, the crown is supplied with the necessary M2 screw for axle fixing.

Can I use this crown in a sidewinder or inline setup?

It is not designed for that. Angle crowns have a tooth profile optimised for the pinion's angle of attack in an anglewinder configuration. For sidewinder or inline, use flat or helical crowns specific to those setups.

How often should I check or change the crown?

It depends on usage. In competition, check the condition of the teeth after each intense session. If you notice asymmetric wear or the teeth have burrs, it is time to replace it. For recreational use, a periodic inspection every few sessions is sufficient.

The Avant Slot AV20656 is a 30-tooth anglewinder crown gear for 2.38 mm axles, featuring a 16 mm diameter and M2 screw fixing. Ideal for 1/32 slot car transmission setups in anglewinder configuration, it delivers precise gear engagement and reliable performance on club and home circuits. Compatible with standard 2.38 mm rear axles widely used in 1/32 scale slot cars.