Aluminium Wheel 16.5x10mm. AIR Monza-2 for Axle 3/32 with M2.5 Screw.

When every tenth counts, the Scaleauto Air Monza-2 SC-4091D25 makes a difference on the track.

Within the 1/32 spare parts catalogue of Scaleauto, the Air Monza-2 family holds a prominent position among the preparation aluminium components. Its design philosophy revolves around a single goal: to eliminate grams where they have the most impact on the dynamic behaviour of the car, that is, in the rotating masses.

Function and performance

The Air technology applied to this rim translates into a structural weight reduction that brings the total weight down to 1.10 g, a particularly relevant figure in 1/32 competition where rotational inertia directly influences acceleration, braking, and cornering response. With less unsprung weight, there is greater track-following capability and less tendency to slip under traction.

The diameter of 16.5 mm and the width of 10 mm define a geometry widely used in competition setups, providing a broad support base for high-grip tyres without compromising cornering performance.

Compatibility

This rim is designed for standard axle measurements of 3/32" (2.38 mm), the most common in most 1/32 competition chassis. The fastening system using an M2.5 screw replaces pressure or glue fittings, offering a firm and repeatable tightening that eliminates play and ensures the concentricity of the rim during prolonged use sessions.

It is important to check the available width in the chassis housing before fitting 10 mm rims, especially in closed chassis or those with adjusted standard fenders.

Assembly and preparation

• Insert the 3/32" axle ensuring it is centred before tightening the M2.5 screw.
• Use a torque wrench or controlled manual tightening: aluminium does not require excessive force, and overtightening can deform the housing.
• Check the runout of the rim on a gauge or reference plate before mounting the tyre, to ensure there is no lateral deviation.
• Match with 10 mm wide tyres corresponding to the desired outer diameter according to category regulations.

Common mistakes

• Confusing screw size: M2.5 is not interchangeable with M2 or M3. Using the wrong screw can damage the threading or leave the rim without effective tightening.
• Fitting rims without checking eccentricity: even in precision machined parts, a small knock or poor storage can introduce deviation. Always check before gluing the tyre.
• Ignoring the weight of the assembly: combining Air rims with heavy tyres or excess glue can negate part of the advantage of the lightweight technology.

Frequently asked questions

How many rims does the SC-4091D25 item include?

The reference SC-4091D25 corresponds to one unit. If you need to equip both rear axles, you will need to purchase two units.

Is the M2.5 screw included?

According to the product description, the rim is supplied with an M2.5 fastening system. We recommend confirming this at the time of order or checking the contents of the blister upon receipt.

Is it compatible with standard Scaleauto chassis or only for custom setups?

The Air Monza-2 rim is primarily aimed at preparation and competition setups. It can be installed on any chassis that accepts 3/32" axles and has enough space for a 10 mm wide rim.

What is the difference between Air technology and a conventional aluminium rim from Scaleauto?

The Air design incorporates weight reductions in the structure of the rim that decrease its total mass. This reduces rotational inertia, improving acceleration and braking response, which is particularly noticeable on tracks with many chicanes or technical sections.

Can I use this rim on Scalextric or Ninco tracks?

Compatibility depends on the chassis and axle, not the track brand. If your car uses 3/32" axles and the chassis accepts rims of these dimensions, you can use it regardless of the circuit brand.

What tyre is recommended for this rim?

With a width of 10 mm and a rim diameter of 16.5 mm, you should look for tyres with an interior compatible with that diameter and the same width. Scaleauto offers specific tyres in its 1/32 spare parts catalogue designed for its Air rims.

The Scaleauto Air Monza-2 SC-4091D25 is a precision-machined aluminium slot car rim measuring 16.5x10mm, designed for 3/32" axles and secured with an M2.5 grub screw. Weighing just 1.10g, its lightweight Air design reduces rotational inertia for improved acceleration and cornering response in 1/32 scale competition. A top choice for club racers and serious builders looking for reliable, high-performance slot car parts and aluminium rims for 3/32 axle setups.