10-tooth inline pinion 5.5mm (X2)

The inline pinion reference for your Slot.it setups

The SIPI10 is the 10-tooth pinion with a diameter of 5.5 mm developed by Slot.it for setups with the motor in an inline configuration, meaning the motor is arranged longitudinally and in line with the rear axle of the car. This type of motorisation lowers the vehicle's centre of gravity and is very common in high-end competition setups. The pack includes 2 units.

Main features

• Number of teeth: 10
• Diameter: 5.5 mm
• Configuration: inline motor (longitudinal)
• Units per pack: 2
• Reference: SIPI10
• Manufacturer: Slot.it

Function and performance

The pinion is one of the most decisive elements in transmitting the motor's movement to the rear axle. A 10-tooth pinion with a diameter of 5.5 mm offers a specific gear ratio that, combined with the appropriate crown gear, defines the acceleration, top speed, and overall behaviour of the car on track. Choosing the right pinion is as important as selecting the motor.

With a lower gear ratio (small pinion + large crown gear), acceleration and torque are improved, especially useful on tracks with many curves or short layouts. With pinions of more teeth or smaller crown gears, top speed is favoured on faster circuits.

Compatibility and installation

This pinion is designed by Slot.it to work with its own transmission systems in an inline configuration. Before installation, it is advisable to verify that the motor shaft and the crown-pinion assembly are compatible to avoid play or premature wear. Slot.it has an extensive catalogue of crown gears and axles with which this pinion can be combined to achieve the transmission ratio that best suits each track and driving style.

Common mistakes

• Confusing inline pinions with sidewinder or anglewinder pinions: they are not directly interchangeable, as the motor position alters the drive shaft.
• Not checking the fit of the pinion on the motor shaft before final assembly: a fit that is too loose results in power loss and accelerated wear.
• Mixing pinions and crown gears of different modules: always ensure that the module of the pinion and the crown gear is the same to guarantee a correct and quiet engagement.

Frequently asked questions

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

The difference lies in the orientation of the motor. In an inline configuration, the motor is arranged longitudinally (in line with the rear axle), while in sidewinder, the motor is transverse (parallel to the axle). Each configuration requires its own type of pinion and transmission, as the drive shaft is different.

Which Slot.it crown gears is this pinion compatible with?

Slot.it offers a wide catalogue of crown gears compatible with its inline pinions. To choose correctly, ensure that the module of the crown gear and the pinion match. We recommend checking the common combinations on the official Slot.it website or asking us directly.

Why does the pack include 2 units?

Slot.it sells this pinion in packs of 2 units, which is very practical whether you are preparing multiple cars or want to have a spare on hand during a competition or tuning session.

Does the number of teeth on the pinion affect the car's behaviour?

Yes, directly. A 10-tooth pinion combined with a larger crown gear favours acceleration and torque, while increasing the number of teeth on the pinion or reducing those of the crown gear shifts performance towards top speed. Adjusting this ratio is one of the most effective resources in tuning a competition slot car.

Is it a component suitable for competition?

Yes. Slot.it is one of the reference brands in competition slot racing, and its pinions are manufactured to the precision standards required in that environment. They are common in club categories and higher-level competitions.

Slot.it SIPI10 inline pinion 10 teeth 5.5mm — pack of 2 units. Designed for inline motor configurations in slot car racing. A precise, competition-ready transmission component compatible with Slot.it's extensive range of gears and axles. Essential for tuning acceleration and top speed ratios on any track layout.