24-tooth inline crown gear for 3/32 axle (4 pcs)

24-tooth inline crowns MB Slot (MB13024): precise transmission for inline setups

Within the 1/32 spare parts catalogue of MB Slot, the crowns of the MB130 series are one of the most valued references by club preparers. This pack MB13024 includes 4 inline crowns of 24 teeth specifically designed for 3/32" axles, the most widely used standard diameter in 1/32 competition cars.

Function and performance

The crown is the gear that receives the movement from the motor pinion and transmits it to the rear axle. In an inline setup —that is, with the motor arranged longitudinally, in line with the rear axle— the geometry of the crown is crucial for achieving a smooth transmission, without play and with minimal friction.

With 24 teeth, this crown offers a shorter gear ratio than the usual 26z or 27z. The practical result is a higher top speed: the motor delivers more revolutions to the axle for each turn of the pinion, resulting in greater final speed on straight sections. The trade-off is a slight reduction in torque when exiting corners, an aspect that should be considered when adjusting the pinion-crown ratio according to the layout.

The polymer material used ensures light and precise rotation, reducing friction and wear on the pinion, which is especially relevant in prolonged practice sessions or club competitions.

Compatibility

• Mounting type: Inline (motor in line with the rear axle).
• Compatible axle diameter: 3/32" (2.38 mm).
• Number of teeth: 24z.
• Pack contents: 4 units.
• Reference: MB13024.

Before mounting, check that your motor's pinion is compatible with the module of this crown. MB Slot maintains module consistency within its range, but it is always advisable to check the pinion-crown combination to ensure correct meshing without play or interference.

Mounting and preparation

The adjustment of the crown to the axle must be done carefully to avoid eccentricities that generate vibration at high speed. It is recommended to check the concentricity after mounting by allowing it to rotate freely before tightening definitively. In competition setups, many drivers check the meshing with the pinion on the chassis before closing the body, adjusting the lateral separation until finding the point of maximum smoothness without play.

Having a pack of 4 units allows for spare parts during a race day without the need to interrupt the car's preparation due to the breakage or wear of a single piece.

Common mistakes

• Confusing inline with sidewinder: this crown is exclusive for inline setups (longitudinal motor). It is not suitable for sidewinder (transverse motor) or anglewinder configurations, which require crowns with different geometry.
• Mixing modules: pairing a crown with a pinion of a different module causes poor meshing, noise, and accelerated wear.
• Over-tightening during assembly: an overly tight adjustment can deform the crown or hinder its free rotation on the axle.

Frequently asked questions

When is it advisable to use a 24-tooth crown instead of a 26z or 27z?

A 24z crown provides more top speed because it reduces the gear ratio: the axle spins faster for each turn of the motor. It is the usual choice on layouts with long straights or when the motor has plenty of power and you want to exploit the final speed. On circuits with many curves or chicanes, it may make sense to move up to 26z or 27z to gain traction and recovery.

Is this crown suitable for any 1/32 slot car with a 3/32" axle?

It is compatible with any 1/32 car that uses inline mounting and a 3/32" rear axle, as long as the motor pinion has the same module as the crown. Check the module compatibility before installing it.

What is the difference between an inline crown and a sidewinder crown?

The difference lies in the orientation of the motor relative to the rear axle. In an inline setup, the motor is in line with the axle (longitudinal) and the crown works in a specific plane. In a sidewinder, the motor is transverse and a crown with different geometry is needed. Using the wrong crown makes correct meshing impossible.

Why does it come in a pack of 4 units?

Having several spare crowns is common practice in competition. If one wears out, breaks, or loses its adjustment to the axle during a race day, being able to replace it in minutes without waiting for a new order makes the difference between continuing on track or not.

Can a disassembled crown be reused?

It depends on its condition. If the axle has left a mark or the crown shows deformation in the hole, it is prudent to replace it. The teeth rarely wear out before the adjustment to the axle, but it is advisable to check both before reassembling.

MB Slot inline crown 24 teeth (MB13024), 3/32 axle slot car gear, 24z inline crown for 1/32 scale slot cars, inline transmission spare parts, MB Slot replacement gears, low friction slot crown, high speed slot gear pack, slot racing inline drivetrain components.