JP JP37 37T Gear for 3mm Axles – Sidewinder & Anglewinder Slot Car Gear

W.A.R. Slot Car Raceway is Australia's specialist slot car parts store.

JP JP37 37T Gear is a precision slot car drivetrain gear designed for use with 3mm axles in both sidewinder and anglewinder configurations. With 37 teeth, the JP37 provides racers with a versatile gearing option for tuning the final-drive ratio of a 1/32 scale slot car.

Whether you're building a competition car from the ground up, replacing a worn gear or experimenting with gearing to suit a particular motor and circuit, the JP37 is a practical addition to any serious slot racer's parts collection.

37-Tooth Gear for 3mm Axles

The JP37 features a 37-tooth gear designed for 3mm axles. Its compatibility with both sidewinder and anglewinder drivetrains makes it particularly useful for racers who work across different chassis and motor configurations.

The 37T specification provides another gearing variable when setting up a car. Changing the crown gear tooth count alters the final-drive ratio and therefore the balance between acceleration, motor loading and theoretical top speed.

Sidewinder & Anglewinder Compatible

Unlike gears intended for only one specific motor orientation, the JP JP37 is suitable for both sidewinder and anglewinder applications. This gives builders greater flexibility when selecting drivetrain components for different chassis designs.

For anglewinder applications, ensure the gear is paired with a compatible anglewinder pinion and that the motor, pinion and crown gear are correctly aligned. Proper gear mesh is essential for quiet running, efficiency and long component life.

Designed for 3mm Axles

The JP37 is specifically intended for 3mm axles, making it suitable for slot car drivetrains using this larger axle standard. The correct axle diameter is critical when selecting a gear: a properly matched gear should run concentrically on the axle without excessive play.

When installing the gear, ensure it is correctly positioned and securely fixed before running the car. Check lateral axle movement and gear mesh carefully, particularly on high-performance builds.

37T Gearing for Performance Tuning

Gear selection is one of the most effective ways to alter the character of a slot car without changing the motor itself. The 37-tooth JP37 can be combined with different pinion sizes to achieve the final-drive ratio required for a particular motor, tyre diameter and circuit.

A larger crown gear relative to the pinion generally produces shorter gearing, increasing torque multiplication and acceleration while reducing theoretical top speed. Conversely, a smaller overall ratio generally favours higher theoretical top speed. The optimum gearing is ultimately determined by the motor, track, tyre diameter and class regulations.

Key Features

• JP JP37
• 37-tooth slot car gear
• For 3mm axles
• Compatible with sidewinder configurations
• Compatible with anglewinder configurations
• Ideal for 1/32 scale slot car builds and race cars
• Useful for replacement, maintenance and gearing changes
• Suitable for performance-oriented slot car setups

Technical Specifications

Gearing & Pinion Selection

The final-drive ratio is determined by the relationship between the 37T crown gear and the mating pinion. For example, a 37T gear paired with a 10T pinion gives a 10:37 gearing combination, while a 12T pinion gives 12:37.

When tuning a car, consider the motor's RPM and torque characteristics together with rear tyre diameter and track layout. Shorter gearing can improve drive out of slower corners, while taller gearing can be advantageous on circuits with long straights.

Installation & Compatibility

Before installation, confirm that your chassis and drivetrain are designed for a 3mm axle and that the mating pinion is compatible with the gear's tooth profile and configuration.

For both sidewinder and anglewinder applications, correct alignment is essential. The gear should run true on the axle, with sufficient clearance from the chassis and correct mesh with the pinion throughout the axle's rotation.

What's Included

• 1 × JP JP37 37T Slot Car Gear

Why Buy From W.A.R. Slot Car Raceway?

W.A.R. Slot Car Raceway is Australia's specialist slot car parts store. We don't just sell slot car parts — we race, build, tune and maintain slot cars ourselves.

For serious racers, drivetrain setup is where small details make a genuine difference. The right gear allows you to tune the relationship between motor characteristics, tyre diameter and track layout rather than simply accepting whatever gearing happens to come fitted to a car.

The JP JP37 gives racers a versatile 37T gearing option for 3mm axles across both sidewinder and anglewinder configurations — exactly the kind of precision drivetrain component that belongs in a serious slot racer's toolbox.