Offset line crown 27Z bronze insert

The Slot.it Offset inline crown gear that makes a difference in transmission

The Offset 27Z crown gear with bronze insert (reference SIGO27-BZ) is a transmission component from Slot.it designed for setups with the motor in an inline position — that is, with the motor arranged longitudinally, in line with the rear axle — and exclusively compatible with Offset motor pods. This combination aims to optimise the transmission geometry and lower the car's centre of gravity to gain stability in corners.

Technical specifications

• Number of teeth: 27Z
• Insert: bronze
• Compatible axle diameter: 2.38 mm
• Motor configuration: inline
• Exclusive use: Offset motor pod
• Brand: Slot.it

Function and performance

The bronze insert is a technical detail that should not be overlooked. Bronze offers excellent wear resistance and controlled friction on the axle, resulting in greater durability of the component and stable fitting during long running or competition sessions. Unlike inserts made from softer materials, bronze maintains its tolerances even under the stress of a well-tuned motor.

With 27 teeth, this crown gear is positioned in a balanced development range: it is neither the shortest nor the longest option in the Slot.it catalogue, making it a versatile choice for adjusting the gear ratio according to the chosen pinion and the characteristics of the track.

Compatibility and installation

It is essential to understand that this crown gear is designed exclusively for setups with Offset motor pods. It is not interchangeable with Sidewinder or Anglewinder configurations. Its geometry and the angle of the teeth are optimised to work correctly in that specific motor position. Installing it outside of that context may result in poor engagement or interference with the chassis.

The accepted axle is 2.38 mm, the most common standard in the Slot.it spare parts ecosystem, making its integration into setups with this brand's materials straightforward and uncomplicated.

Who is this crown gear for?

It is intended for tuners and drivers working with Slot.it chassis in inline + Offset configuration who seek to fine-tune the transmission with reference components. It is also the natural choice when replacing a worn crown gear in an already run setup, to maintain fidelity to the original specifications of the assembly.

Common mistakes

• Trying to use it in a Sidewinder or Anglewinder pod: it is not compatible. Each type of pod has its own family of crown gears in the Slot.it catalogue.
• Not checking the axle diameter before installation: always confirm that the axle is 2.38 mm to avoid unnecessary play or stress.
• Neglecting the crown-pinion alignment: a poor lateral alignment, even if the crown gear is perfect, generates vibrations and premature wear. Check the coplanarity before finalising the installation.

Frequently asked questions

Can I use this crown gear with any Slot.it pod?

No. The SIGO27-BZ is designed exclusively for Offset pods with the motor in an inline position. It is not compatible with Sidewinder or Anglewinder pods.

What advantage does the bronze insert provide over other materials?

Bronze is more wear-resistant than plastic or soft brass, and it maintains better fitting tolerances with the axle over time. It is a common choice in competition setups where long-term reliability matters.

Which pinions pair well with this 27-tooth crown gear?

The final gear ratio depends on the pinion you mount on the motor. Slot.it offers several pinions compatible with this configuration. The optimal choice depends on the type of track and the motor used. Consult the Slot.it pinion catalogue to find the combination that best suits your setup.

Is it suitable for competitive use?

Yes. It is a reference spare part from Slot.it, used in both club setups and more demanding preparations. Its bronze insert makes it particularly suitable for intensive running.

Is the 2.38 mm axle the standard in Slot.it?

Yes, 2.38 mm (equivalent to 3/32") is the most widespread rear axle diameter in the Slot.it ecosystem and in a large part of the slot car spare parts market for Sport track.

The Slot.it SIGO27-BZ is a 27-tooth inline crown gear with bronze insert, designed exclusively for Offset motor pod configurations and compatible with 2.38 mm axles. A reliable, competition-ready transmission component for slot car enthusiasts building or tuning inline motor setups on Sport-track systems.