Offset 25Z crown gear aluminium insert

The Slot.it crown gear for inline with Offset pod: 25 teeth with aluminium insert

When working with an inline motor configuration and opting for an Offset pod to adjust the position of the power unit, choosing the right crown gear is as important as any other element of the drivetrain. This 25-tooth crown gear with aluminium insert from Slot.it (reference SIGO25-AL) is specifically developed for that setup, ensuring a precise and backlash-free fit.

Technical specifications

• Number of teeth: 25Z
• Insert: aluminium
• Compatible axle diameter: 2.38 mm
• Exclusive use: Offset pod
• Motor configuration: inline (motor aligned with the rear axle)

Function and performance

The aluminium insert provides rigidity and durability compared to standard insert versions. On track, this translates to cleaner power transmission, with less energy loss between motor and axle, and greater wear resistance during long sessions or club competitions. The fit on the 2.38 mm axle — the most common standard in the Slot.it range — is firm and concentric, minimising vibrations and maintaining consistency on every lap.

Compatibility and installation

This crown gear is designed exclusively for use with Offset pods. It is not suitable for sidewinder or anglewinder setups: its geometry and positioning cater to the specific needs of the inline configuration in an Offset pod, where the motor is oriented longitudinally relative to the rear axle. Before installation, it is advisable to check that the motor pinion has the compatible module to ensure correct and quiet meshing.

Installation and preparation

For optimal installation, we recommend securing the aluminium insert with a retention point (low-strength loctite or similar) once the gear distance with the pinion is adjusted. Checking concentricity by manually rotating the axle before permanently gluing the crown avoids issues with vibration or noise on track.

Frequently asked questions

Can I use this crown gear in a sidewinder configuration?

No. This crown gear is for exclusive use with Offset pods for inline motors. For sidewinder configurations, Slot.it offers specific crown gears with geometry adapted for that setup.

What axle diameter does this crown gear require?

It is designed for 2.38 mm axles, the usual standard in the Slot.it preparation range.

What advantage does the aluminium insert provide over other materials?

Aluminium offers greater rigidity and better heat dissipation than plastic inserts, resulting in increased durability and a more solid power transmission, especially in intensive use or competition.

Is it necessary to use a specific pinion with this crown gear?

It is essential to ensure that the motor pinion has the module compatible with the crown gear (Slot.it standard module). An incorrect gear meshing would cause excessive noise and premature wear of both parts.

Can it be used on SPORT track and UNIVERSAL track?

The crown gear itself is not limited by the type of track, but by the chassis and pod configuration. As a Slot.it part, it naturally fits into chassis and pods of the same brand, designed for SPORT track, although nothing prevents it from being mounted on a custom chassis for any track system.

The Slot.it SIGO25-AL is a 25-tooth crown gear with aluminium insert, designed exclusively for inline motor setups using an Offset motor pod. Compatible with 2.38 mm axles, it delivers precise, low-vibration power transmission for slot car racing. A reliable upgrade for club competitors and serious hobbyists looking for consistent performance on every lap.