Offset 27Z crown gear aluminium insert

The inline crown gear with Offset pod that makes a difference in the rear end

The Offset 27Z Crown Gear with Aluminium Insert (reference SIGO27-AL) is a Slot.it transmission component designed for inline setups where the motor is positioned longitudinally relative to the rear axle. Its distinguishing feature is the aluminium insert, which provides a firm grip on the axle and a cleaner, more durable power transmission than conventional inserts.

Technical specifications

• Number of teeth: 27Z
• Compatible axle diameter: 2.38 mm
• Insert: aluminium
• Motor configuration: inline with Offset pod

Function and performance

With 27 teeth, this crown gear offers a gear ratio aimed at balancing acceleration and top speed, making it a versatile choice for different types of circuits. The aluminium insert is not a minor detail: it reduces play relative to the axle, minimises vibrations, and withstands heat better during prolonged running sessions. The result is a more consistent power transmission and a longer lifespan for the component.

Compatibility and installation

This crown gear is designed exclusively for use with an Offset pod in inline configuration. It is not suitable for sidewinder or anglewinder setups. Before installation, ensure that your chassis or base incorporates the corresponding Offset pod and that the rear axle has a diameter of 2.38 mm. Proper installation guarantees precise alignment between pinion and crown gear, which directly translates into smooth running and reduced wear on the drivetrain.

Who is this crown gear for?

It is the natural choice for enthusiasts who prepare or refine inline setups with an Offset pod in Sport track slot cars, a common format in the technical range of Slot.it. It is also very suitable for club competitors looking for reference spare parts to keep the rear end always in tune.

Frequently asked questions

Can I use this crown gear in a sidewinder setup?

No. This crown gear is designed exclusively for inline configuration with an Offset pod. In a sidewinder, the motor orientation is transverse to the axle, requiring a crown gear of different geometry.

What advantage does the aluminium insert have over a plastic one?

Aluminium offers greater rigidity, better heat dissipation, and a more precise grip on the axle. This translates into less play, less vibration, and greater durability in continuous use.

Is it compatible with 3/32" (2.38 mm) axles?

Yes. The diameter of 2.38 mm is equivalent to 3/32 of an inch, the most common standard in technical slot cars.

Which pinions work best with this 27-tooth crown gear?

The choice of pinion depends on the gear ratio you are looking for and the motor used. Slot.it offers pinions of various diameters and tooth counts within its range, allowing you to adjust the ratio for each circuit or category.

Do I need any special tools to install it?

For a precise fit of the aluminium insert onto the axle, it is recommended to use an axle press or a suitable mounting tool, avoiding direct impacts that could damage the teeth or deform the insert.

The Slot.it SIGO27-AL is a 27-tooth inline offset crown gear with aluminium insert, compatible with 2.38 mm axles. Designed for inline motor configurations using an offset motor pod, it delivers precise and reliable power transmission for slot car racing on Sport track systems. A go-to upgrade or replacement part for technical slot car builds and club-level competition.