Rear Aluminium Wheels 15.85x9.5mm

Thunder Slot TH-RMR003AL Aluminium Rear Rims: CNC Precision for Your 1/32 Setup

When every hundredth counts, the balance between lightness and rigidity of a rim makes a difference. The Thunder Slot TH-RMR003AL aluminium rear rims are CNC machined from high-strength aluminium, eliminating any dimensional irregularities and ensuring completely vibration-free rotation. The result is a cleaner setup, increased traction, and a more predictable response in both acceleration and braking.

Function and Performance

The 15.85mm diameter by 9.5mm width is a widely used rear format in the 1/32 category, compatible with a considerable variety of competition tyres. By reducing the unsprung mass compared to standard plastic rims, a noticeable improvement in rear-end response is achieved, especially on tracks with chicanes and tight corners where bouncing penalises lap times.

The fixation via M2 Allen grub screw ensures precise centring and a firm grip on the axle, avoiding play that introduces imbalances. This system allows for quick disassemblies during a tuning session without compromising the repeatability of the assembly.

Compatibility

• Axle: standard 3/32" (2.38mm).
• Outer diameter: 15.85mm.
• Width: 9.5mm.
• Fixation: M2 Allen grub screw.
• Recommended use: rear axle in GT, LMP, and classic competition models 1/32.

The diameter of 15.85mm is compatible with the main competition tyres available in the 1/32 market. Always check the specifications of the chosen tyre to confirm the fit before assembly.

Assembly and Preparation

The assembly process is straightforward: insert the 3/32" axle into the central hole of the rim and tighten the M2 Allen grub screw with the appropriate tool until you feel firm resistance, without exceeding the recommended torque to avoid damaging the aluminium. Before mounting the tyre, check that the rim rotates concentrically on the axle; in quality CNC rims, this step is usually a mere verification protocol, but it is advisable not to skip it.

If you are working with soft rubber tyres, apply the adhesive evenly on the rim's edge to prevent the tyre from walking laterally under load. A fine sanding of the rim in that area improves the glue's adhesion.

Common Mistakes

• Over-tightening the Allen grub screw: this can slightly deform the axle hole and create artificial eccentricity. Tighten firmly but with control.
• Mixing rims from different batches: although CNC tolerances are minimal, in serious competition it is advisable to always use rims from the same manufacturer and reference on the same axle.
• Not verifying the actual tyre diameter: the same tyre can vary between compounds. Always measure with a micrometer after assembly and running-in.

Ideal for…

Preparers and club drivers looking for a tangible improvement without significant investments. Also for those building cars from brands like NSR, Slot.it, or Scaleauto who want to standardise their rear rims with a reference replacement within the Thunder Slot catalogue. Its versatile size makes it a solid option for GT and LMP bodies, as well as for classic competition where this rear diameter is common.

Frequently Asked Questions

Are these rims suitable for any 1/32 slot car?

They are compatible with any 1/32 model that uses standard 3/32" (2.38mm) axles and where the size 15.85x9.5mm fits the bodywork's wheel arch. Always check the available space before mounting.

How many rims does the TH-RMR003AL reference include?

Check the product description or contact us to confirm the exact content of the blister, as the manufacturer may package one or two units depending on the commercial format.

Do I need special tools to mount these rims?

You only need an Allen key of the appropriate size for the M2 grub screw. No presses or special tooling are required for standard assembly.

Are they compatible with tyres from other manufacturers besides Thunder Slot's own?

The diameter and width of 15.85x9.5mm is a common format in the 1/32 market, so many competition tyres from other manufacturers may fit. Always check the specifications of the chosen tyre to ensure a proper fit and concentricity.

What real advantage does aluminium offer over plastic in a rear rim?

CNC machined aluminium reduces the weight of the rim, decreases the rotating mass, and eliminates the micro-deformations typical of plastic under temperature. The practical effect is a more stable response from the rear end and less tendency to unintended sliding in fast corners.

Can I use these rims on both wooden and plastic tracks?

Yes. The rim itself has no restrictions based on track type; the choice of tyre compound is what determines optimal behaviour according to the rail surface.

Thunder Slot TH-RMR003AL aluminium rear rims 15.85x9.5mm — precision CNC-machined 1/32 scale slot car wheels for 3/32" axles. Lightweight aluminium construction with Allen M2 grub screw fixing. Compatible with NSR, Slot.it and Scaleauto setups. Ideal for GT, LMP and classic competition builds. Available at Ministry of Hobby.