30t crown gear inline Aluminium Step 2 Offset 1mm

Slot.it 30z Aluminium Crown for Inline Mounting with Step 2 — Precision Where Every Gram Counts

Within the spare parts catalogue of Slot.it, the reference SIGO30AL occupies a very specific place: it is the 30-tooth crown made of aluminium designed for 1/32 slot cars with inline motorisation (motor in line with the rear axle) and elevated axle mounts. A tuning component where the combination of material and geometry makes a measurable difference.

Function and Performance

The aluminium core is the differentiating element compared to bronze or plastic versions. By reducing the rotational mass of the drivetrain, the motor operates with less inertia: acceleration becomes more immediate and power cut translates into cleaner braking. In technical circuits with many slow corners, that difference in response can be decisive in club competition.

With a module 50, 30 teeth, and a diameter of 17.3 mm, this crown is part of the standard gearing system of Slot.it. The attachment to the axle is made via M2 grub screw, ensuring a solid grip without axial play, even under load in fast corners.

Compatibility and Mounting

The Step 2 geometry with 1 mm offset is the technical key of this piece. When using a motor mount with the rear axle elevated relative to the standard position, the plane of the crown shifts laterally. Without that compensated offset in the crown itself, the engagement with the pinion would be misaligned, generating friction, noise, and power loss. This crown precisely solves that problem.

• Mounting type: inline (motor in line with the rear axle)
• Teeth: 30z
• Module: 50
• Diameter: 17.3 mm
• Offset: Step 2 — 1 mm offset
• Compatible axle: 3/32" (2.38 mm)
• Attachment: M2 grub screw
• Material: aluminium

Common Mistakes When Choosing This Crown

The most common mistake is confusing Step 2 with a gear ratio measurement. The Step refers only to the lateral displacement of the crown relative to the central plane, not to the number of teeth or the gear ratio. Before ordering, it is advisable to confirm the type of motor mount being used and whether it indeed elevates the rear axle. Installing it on a standard mount without offset will result in incorrect engagement.

Similarly, although aluminium offers weight advantages, it is somewhat more sensitive than bronze to imprecise mounts or excessive lateral stresses. A careful adjustment of the grub screw and proper alignment of the pinion significantly prolong the lifespan of the part.

Frequently Asked Questions

What is the difference between a Step 1 and a Step 2 crown?

The Step number indicates the magnitude of the lateral displacement of the crown. Step 1 corresponds to an offset of 0.5 mm and Step 2 to 1 mm. Each value is designed for a specific type of elevated motor mount; choosing the wrong Step causes misalignment in the engagement.

Is this crown compatible with pinions from other brands?

As long as the pinion is module 50 (the most common standard in 1/32 racing slot cars), the engagement will be correct. Nevertheless, Slot.it recommends using its own pinions to ensure manufacturing tolerance and optimal tooth play.

Why choose aluminium over bronze for this crown?

Aluminium is lighter, which reduces rotational inertia and improves motor response in both acceleration and braking. Bronze, on the other hand, offers greater durability against mechanical wear. For competition where dynamics are prioritised, aluminium is the usual choice; for intensive recreational use, bronze may be more durable.

Is this crown suitable for sidewinder or anglewinder configurations?

No. This reference is specifically designed for inline mounting (motor in line with the rear axle). For sidewinder or anglewinder layouts, Slot.it has specific references with geometry adapted to each type of mount.

How many teeth should the pinion have to combine with this crown?

The optimal gear ratio depends on the motor, the length of the circuit, and the driving style. With 30 teeth on the crown, pinions with between 10 and 13 teeth are the most common on medium-length club tracks. There is no single answer: tuning is part of the preparer's work.

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