Crown gear 34t

34-tooth Crown Gear from Avant Slot: Mechanical Precision for Your Drivetrain

The 34z Crown (AV20660) from Avant Slot is a transverse crown gear designed for sidewinder configurations, where the motor is positioned parallel to the rear axle. With 34 teeth, a diameter of 18.75 mm, and an aluminium core, it offers a combination of lightness and robustness aimed at those who fine-tune every detail of the transmission. The M2 fixing screw ensures a firm and centred mounting on the axle.

Technical Features

• Number of Teeth: 34z
• Type: Transverse (sidewinder)
• Diameter: 18.75 mm
• Core: Aluminium
• Fixing: M2 Screw
• Reference: AV20660
• Manufacturer: Avant Slot

Function and Performance

The crown gear is one of the most decisive elements of the drivetrain in a slot car. Its diameter and number of teeth directly determine the gear ratio alongside the motor pinion, translating into the balance between top speed and acceleration on track.

A 34-tooth crown gear offers a gear ratio that favours progressive acceleration, especially useful on technical circuits with tight corners and braking sections. The aluminium core reduces rotating weight compared to plastic or zamak options, contributing to a livelier response at startup.

Mounting and Preparation

The mounting with an M2 screw allows for precise adjustment on the rear axle, without play that generates vibrations or premature wear. Before securing it, it is advisable to check the alignment with the motor pinion: a slight misalignment can result in noise, power loss, or uneven wear of the teeth. With the correct wheelbase and a light lubrication on the tooth flanks, the transmission operates quietly and efficiently.

Common Errors

• Over-tightening the M2 screw: can deform the core or create stress on the axle. Tighten until the crown is firm without forcing.
• Not checking the clearance with the pinion: neither too tight (causes heat and wear) nor too loose (causes tooth skipping).
• Using this crown in inline configuration: it is specifically designed for transverse (sidewinder) mounts; inline requires crowns with different tooth profiles.

Ideal for…

This crown fits perfectly in slot cars with sidewinder motors, suitable for both club use and competition in technical categories. It is a common choice in setups where a gear ratio is sought that balances acceleration and speed without sacrificing reliability.

Frequently Asked Questions

Which pinions is this crown compatible with?

Compatibility depends on the tooth module. Avant Slot works with a specific module in its range of crowns and pinions; it is most advisable to combine it with pinions from the same brand and range to ensure a correct tooth fit.

What gear ratio do I get with this 34-tooth crown?

The gear ratio is calculated by dividing the number of teeth of the crown by those of the pinion. For example, with a 9z pinion, you get a ratio of approximately 3.78:1. A higher ratio provides more acceleration and lower top speed; a lower ratio offers higher top speed but a more demanding start.

Is it suitable for competition or just for recreational use?

The aluminium core and manufacturing precision of Avant Slot make it perfectly suitable for club competition. It is the same type of component that regular tuners use in technical categories.

Do I need special tools to mount it?

No special tools are required: an Allen key of the appropriate size for the M2 screw is sufficient. However, we recommend a gauge to check the centring and clearance with the pinion before considering the circuit prepared.

How long does it last before needing replacement?

With proper lubrication and correct alignment, wear is very slow. Periodic inspection of the teeth—especially after long competition sessions—is sufficient to detect when it is advisable to replace it.

The Avant Slot AV20660 is a 34-tooth sidewinder crown gear with an aluminium core and M2 fixing screw, measuring 18.75 mm in diameter. Designed for slot car racing in 1/32 scale, it delivers precise power transmission for club racing and technical category competition. Compatible with Avant Slot pinion gears, this lightweight aluminium crown is a go-to choice for slot car tuners seeking reliable and efficient drivetrain performance.