30t crown gear 17 mm lightweight plastic Sidewinder

Slot.it SIGS17030-LPL: lightweight crown for Sidewinder that changes the car's response

Within the Slot.it spare parts catalogue for transverse crowns, the SIGS17030-LPL holds a clear position: it is the option of 30 teeth at 17 mm in diameter in LPL (Light Plastic) version, designed for those who want to maximise the transmission in Sidewinder configurations without adding unnecessary weight to the rotating assembly.

Function and performance

The principle is simple but the effect on track is immediate: by lightening the body of the crown through holes in its structure, the gyroscopic effect generated on the rear axle is reduced. This translates to the motor revving up more quickly when exiting a corner, shorter braking distances, and the chassis working with less inertia to combat during each direction change.

With 30 teeth and 17 mm in diameter, this ratio is aimed at technical and twisty circuits where trigger response matters more than top speed. It is one of the most commonly used combinations in Group C and touring car categories with transverse mechanics, where regulations impose the use of plastic crowns.

Compatibility

The SIGS17030-LPL is designed to mesh with standard Slot.it pinions, both brass and steel, in Sidewinder configuration (motor parallel to the rear axle). It fits into Slot.it chassis that utilise this type of transmission, and the attachment to the axle is made using the usual Allen screw system that ensures solidity without play, even with high-torque motors.

Assembly and preparation

• Check the alignment with the pinion before tightening definitively: a small lateral misalignment is noticeable in noise and premature wear.
• Adjust the axial play with the appropriate spacers to avoid lateral rubbing.
• Being self-lubricating plastic, it does not require abundant lubrication; a minimal point of contact with the pinion is sufficient and recommended.
• Periodically check the condition of the teeth if running with high-power motors: although the technical plastic is durable, wear against steel pinions is greater than with metal crowns.

Common mistakes

The most common mistake is mounting the crown without checking coaxiality with the axle: if the crown wobbles even by tenths of a millimetre, power delivery becomes irregular and vibrations occur during acceleration. Another frequent mistake is over-tightening the Allen screw, which can deform the plastic hub and create the same eccentricity that one aims to avoid. A firm but moderate tightening, with the axle clean and dry, is all this part needs.

Frequently asked questions

What is the difference between an LPL crown and a standard plastic crown?

The LPL version incorporates lightening holes in the body of the crown. This reduces the total weight of the part and, above all, decreases the rotational moment of inertia, improving acceleration and braking response compared to a solid plastic crown of the same diameter and number of teeth.

Is this crown suitable for Inline or Anglewinder motors?

No. The SIGS17030-LPL is designed exclusively for Sidewinder configurations, that is, with the motor parallel to the rear axle. For Inline or Anglewinder setups, crowns of different geometry are required.

Which pinions is it compatible with?

It fits with standard Slot.it pinions. Consult the Slot.it catalogue to identify the appropriate pinion reference according to the number of teeth you need for your gear ratio.

Is it a good option for long-distance racing?

Yes. The self-lubricating technical plastic used by Slot.it in these crowns offers low friction and controlled wear, making it suitable for both qualifying sessions and endurance races. Nevertheless, it is advisable to check the condition of the teeth based on the pinion used and the power of the motor.

Do I need special tools to mount it?

Only an Allen key of the appropriate size for the fixing screw included in the Slot.it system. No press tools or interference adjustments are required: the assembly is direct onto the axle.

Can I combine it with steel pinions?

Yes, it is compatible with steel pinions, although the wear on the plastic crown will be slightly greater than with brass pinions. For continuous competition use with powerful motors, some preparers prefer to monitor the condition of the teeth more frequently when using this combination.

The Slot.it SIGS17030-LPL is a 30-tooth, 17 mm lightweight plastic crown (LPL version) designed for Sidewinder layouts in 1/32 scale slot cars. Its lightened body reduces rotational inertia on the rear axle, delivering faster motor response, sharper braking and improved overall handling on technical circuits. A reliable choice for Group C and touring car regulations that require plastic transverse gears, this Slot.it spare part offers low-friction running and precise mesh with standard Slot.it pinions.