Inline pinions Low friction 10 Teeth (x2) EVO3

Low Friction Inline EVO3 Pinions: NSR Precision for a Transmission that Makes a Difference

Pinions are, along with the crown gear, the heart of the transmission in any slot car. A poorly chosen pinion or one with excessive friction results in a loss of top speed, increased motor consumption, and less predictable behaviour on track. NSR knows this well, and that is why its EVO3 range represents an evolution focused precisely on reducing that friction to the minimum possible.

Function and Performance

These pinions are specifically designed for inline setups, meaning configurations where the motor is positioned longitudinally, in line with the rear axle. This arrangement is particularly valued in competition because it lowers the car's centre of gravity and enhances stability in corners.

The 10 teeth specification determines the gear ratio along with the crown gear used: the fewer teeth on the pinion, the greater the multiplication and therefore the higher the top speed, at the expense of slightly less acceleration. With 10 teeth, we enter a common range for medium-high speed tracks, although the optimal configuration always depends on the motor, crown gear, and specific layout.

The EVO3 technology from NSR incorporates optimised materials and tooth geometries to reduce gear friction. The result is a smoother transmission, with less heat generated and less wear on both the pinion and the crown gear it works with.

Compatibility

These pinions are designed for the NSR inline transmission system. They are compatible with the axles and crown gears from the NSR range for longitudinal setups. Before installation, it is advisable to verify that the pinion module matches that of the crown gear used in the car, as NSR works with specific modules depending on the application.

Installation and Preparation

The installation is not particularly difficult, but it does require attention to the meshing with the crown gear. A gear mesh that is too tight generates unnecessary friction; too loose, noise and premature wear. The usual recommendation is to seek a slight play perceptible when manually moving the assembly, ensuring it turns without dragging.

The pack includes 2 pinions, allowing for a spare ready or to prepare two cars at once without the need for an additional order.

Common Mistakes

• Mixing EVO3 pinions with crown gears of a different module: the meshing will not be correct and wear will accelerate.
• Over-tightening the fixing screw on the axle, which can deform the pinion or create a tight spot in the transmission.
• Not checking the lateral alignment between pinion and crown gear, especially after changing the motor or chassis.

Ideal for…

Any preparer or club driver using NSR cars with inline motors who wants to optimise the transmission by reducing losses due to friction. Also interesting as a preventive maintenance spare before an important competition, when every tenth counts.

Frequently Asked Questions

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

The inline pinion is used in setups where the motor is oriented longitudinally, in line with the rear axle. The sidewinder pinion corresponds to setups where the motor is parallel (transverse) to the axle. They are not interchangeable: each is designed for the transmission geometry of its configuration.

Which crown gears are compatible with these pinions?

They are compatible with NSR crown gears designed for the same module as the EVO3 pinions. Check the NSR technical sheet or the brand catalogue to confirm the correct combination according to your chassis configuration.

How many pinions does this pack include?

The pack includes 2 pinions with 10 teeth.

What gear ratio do I get with 10 teeth?

The gear ratio depends on the pinion-crown gear combination. With a 10-tooth pinion, the final ratio varies according to the number of teeth on the chosen crown gear. The greater the difference between crown and pinion, the greater the multiplication and top speed, but lower acceleration. It is common to experiment with different crown gears to find the optimal point according to the layout.

When should I change the pinions?

When visible wear is noticed on the teeth, gear noise that did not exist before, or a loss of smoothness in the transmission. In competition, many drivers check them preventively after a certain number of sessions even if there is no visible wear.

NSR inline low-friction pinions 10 teeth EVO3 (pack of 2), reference NSR7010EVO3 — precision slot car transmission parts engineered for inline motor configurations. Designed to minimize gear friction and maximize drivetrain efficiency, these EVO3 pinions are a go-to upgrade for club racers and competitive slot car enthusiasts seeking smooth power delivery and reduced wear. Compatible with NSR inline setups and matching NSR crown gears.