11 Teeth Ø 5.5mm - Inline - Extralight

Tune the transmission with the NSR 11T Ø5.5mm Inline Extralight crown gear

The reference NSR6811 is an 11-tooth crown gear with a diameter of 5.5 mm, specifically designed for Inline configurations — that is, with the motor arranged inline and perpendicular to the rear axle — and manufactured under the Extralight concept, which minimizes rotational weight to enhance acceleration response and transmission efficiency.

Main features

• Number of teeth: 11
• Diameter: Ø 5.5 mm
• Configuration: Inline (motor inline with the rear axle)
• Construction: Extralight — lower rotational inertia
• Brand: NSR

Function and performance

In an Inline setup, the crown gear meshes directly with the motor pinion, which is oriented parallel to the longitudinal axis of the chassis. With only 11 teeth and the Extralight treatment, this crown gear allows for longer gear ratios when combined with smaller pinions, favouring higher top speeds on fast tracks or long straights.

The reduction of mass in the crown gear is not a minor detail: in competition, every tenth of a gram in rotating parts affects the motor's reaction capability and the management of inertia during braking. NSR works with very tight tolerances in this range, resulting in a clean mesh with no play.

Compatibility and installation

This crown gear is designed for NSR chassis in Inline configuration. Before installation, it is advisable to verify that the motor pinion is compatible with the tooth pitch of this crown gear. NSR offers a wide range of pinions that allow for different gear ratios depending on the type of track and motor used.

The installation is straightforward: it is fixed to the rear axle while respecting the alignment with the pinion to avoid vibrations or premature wear. A small adjustment with the appropriate tool and a visual check of the mesh are sufficient before running.

Recommended applications

Especially suitable for tracks with long straights where high top speed is sought, or for competition setups where every gram of rotating mass counts. It is also useful when experimenting with different gear ratios without investing in a complete kit.

Common mistakes

• Combining this crown gear with a pinion of a different pitch: always check the module compatibility before installation.
• Over-tightening the fixing screw on the axle, which can deform the crown gear or hinder subsequent disassembly.
• Not checking the crown-pinion alignment, which can lead to noise, uneven wear, and loss of performance.

Frequently asked questions

What is the difference between an Inline crown and a Sidewinder?

The Inline crown is used when the motor is mounted longitudinally (in line with the rear axle), while the Sidewinder crown corresponds to a transverse motor arrangement. They are not interchangeable: each configuration requires its own crown gear.

What advantage does the Extralight construction provide?

By reducing the weight of the crown gear, the rotational inertia of the transmission assembly is decreased. This improves acceleration response and makes the motor operate more efficiently, especially on tracks with many changes of pace.

Which pinions is this crown gear compatible with?

It must be combined with NSR pinions of the same tooth pitch. Consult the NSR transmission ratio table to choose the most suitable pinion-crown combination according to the motor and track.

How many units does this reference include?

The available information does not specify the number of units per package. We recommend checking the product sheet or contacting us before placing an order if you need confirmation.

Is it suitable for club racing?

Yes. The NSR range is precisely aimed at club racing and the preparation of high-performance cars. This crown gear is a common choice among those looking to fine-tune the transmission with precision components.

The NSR6811 is an 11-tooth Inline crown gear with a 5.5mm diameter, built under the Extralight concept for reduced rotational mass. Designed for NSR Inline motor configurations, it allows fine-tuning of the transmission ratio in slot car racing. Compatible with NSR axle systems, this lightweight crown gear is a top choice for club racing and performance slot car preparation.