16.5x10 aluminium rear wheels NO Air xtralight

Machined aluminium for the tenth: the NSR Xtralight 16.5x10 NO Air rear wheels (NSR5032) for 1/32 slot racing.

Within the NSR aluminium spare parts catalogue for 1/32 scale, these rear wheels from the Xtralight series represent one of the most refined options for those looking to reduce weight on the axles without compromising dimensional precision. The NO Air design —continuous surface without perforations— provides total support for the tyre, ensuring that the contact patch is uniform from the very first centimetre of rolling.

Function and performance

The NSR Xtralight philosophy is based on a clear principle: every gram removed from the rotational masses (wheels and tyres) translates into gained reaction time. By reducing the inertia of the rear assembly, the motor requires less effort to accelerate, and the car responds more immediately both when applying and releasing the throttle. During braking, the effect is equally noticeable: the wheel loses speed more quickly, and the tyre operates with greater efficiency.

The high-precision CNC machining ensures very tight concentricity, eliminating vibrations caused by imbalances during rotation. On track, this is perceived as a more stable car on long straights and with less tendency to lose traction in high-speed corners.

Compatibility and assembly

• Dimensions: Ø 16.5 mm diameter × 10 mm width.
• Compatible axle: Standard 3/32" (2.37 mm).
• System: NO Air — smooth and continuous surface for total tyre support.
• Material: CNC processed aluminium.
• Fixing: M2.5 (0.050") Allen screws for secure attachment.
• Contents: Pair of rear wheels.

The 16.5 mm diameter is one of the most common standards in 1/32 slot for GT bodies and low-profile prototypes. Before mounting, it is advisable to check that the total height of the wheel+tyre assembly is appropriate for the body and the guide height of your specific model.

Assembly and preparation

The assembly of these wheels does not require special tools beyond an Allen key of the size corresponding to the M2.5 screw. It is recommended to:

1. Check that the axle is clean and free of burrs before inserting the wheel.
2. Tighten the fixing screw with controlled torque: just enough to prevent it from turning, without forcing the aluminium.
3. Verify the concentricity with a gauge or rolling checker before mounting the final tyre.
4. If tyres are to be trued, always do so with the wheel already mounted on the axle to respect the actual centre of rotation.

Common mistakes

• Confusing the Air system with the NO Air: Air wheels have perforations to accommodate foam tyres with internal ventilation; NO Air wheels have a solid surface and are designed for conventional urethane or rubber tyres. Ensure you choose the variant that corresponds to your type of tyre.
• Over-tightening the Allen screw: Aluminium is softer than steel; excessive tightening can damage the threaded housing.
• Not checking the run-out after assembly: Although factory concentricity is high, any small deviation during assembly can cause vibration. A couple of minutes of verification can prevent problems on track.

Frequently asked questions

What is the difference between the Air system and the NO Air in NSR wheels?

Air wheels have perforations or channels designed to work with foam tyres that require ventilation. NO Air wheels feature a continuous surface and are intended for conventional urethane or rubber tyres, providing total support across the entire width of the tyre.

What axles are these NSR5032 wheels compatible with?

They are compatible with standard 3/32" (2.37 mm) axles, the most common diameter in 1/32 slot cars from brands like NSR, among others.

Are they sold with fixing screws included?

Yes, the NSR5032 reference includes M2.5 (0.050") Allen screws for attachment to the axle.

What type of track are these NO Air design wheels best suited for?

The NO Air design is particularly suitable for tracks with a good level of grip, whether wooden or plastic, where maximising the tyre contact surface is beneficial. Under these conditions, the direct response provided by the continuous surface is a clear advantage.

What type of tyre is recommended for these wheels?

As NO Air wheels, they are compatible with urethane or rubber tyres. The choice of specific compound will depend on the type of track and the grip conditions of each circuit.

Is it necessary to true the tyres after assembly?

It is not mandatory, but in competition, it is a common practice to ensure that the effective diameter is perfectly uniform. If truing is done, it should always be carried out with the wheel mounted on the actual axle of the car.

The NSR5032 Xtralight NO Air aluminium rear wheels are a precision-machined 1/32 slot car upgrade designed to minimise rotational inertia and improve motor response. With a 16.5 mm diameter and 10 mm width, they fit standard 3/32" axles and deliver a solid, vibration-free contact surface for urethane or rubber tyres. A go-to choice for club racers and competitive slot car builders looking for lightweight aluminium wheels with CNC accuracy and secure Allen screw fixing.