Magnesium wheel 16.5x10x1.5 M2

Slot.it Magnesium Wheels: Less Weight, More Response in Every Corner

Within the Slot.it magnesium spare parts catalogue, these hollow wheels ø16.5x10x1.5mm represent one of the most sought-after components by tuners looking to minimise rotating mass. Weighing only 0.9g per unit and secured with an M2 screw, their integration into the running gear of any car prepared for Sport track is direct and clean.

Technical Specifications

• Material: magnesium (hollow)
• Outer diameter: ø16.5 mm
• Width: 10 mm
• Wall thickness / offset: 1.5 mm
• Fixing: M2 grub screw
• Weight per unit: 0.9 g
• Pack contents: 2 units
• Previous reference: WH1186-Mg
• Current reference: SIW16510215M

Function and Performance

Magnesium is one of the lightest structural metals available for the manufacture of 1/32 scale slot wheels. Compared to conventional aluminium or plastic wheels, a hollow magnesium wheel drastically reduces rotational inertia: the car responds more quickly to the throttle on corner exit and brakes more effectively, as there is less mass rotating that needs to decelerate.

The hollow design further enhances this advantage: structural rigidity is not sacrificed, but grams are removed where material is least needed. In club racing or series with minimum weight regulations, this type of component allows the saved grams to be allocated to ballast the chassis at strategic points.

Compatibility and Installation

The fixing with an M2 grub screw is the standard in the Slot.it ecosystem, making it easy to interchange with other wheel sets from the brand without needing to adapt the axle. Before installation, it is advisable to check that the axle is perfectly straight and free of burrs to avoid compromising the concentricity of the wheel, which is critical in such a lightweight component where any imbalance is amplified at high speeds.

To complete the set, it is recommended to check the diameter of the tyre to be paired: the width of 10 mm and outer diameter of 16.5 mm must coordinate with the profile of the chosen tyre to achieve the desired final rolling diameter.

Installation and Preparation: Key Considerations

• Tighten the M2 screw to the correct torque: magnesium is softer than steel and over-tightening can damage the screw seat.
• Check concentricity after installation with a dial gauge or by rolling the axle on a flat surface before fitting the tyres.
• If you plan to sand or machine the tyres once fitted, protect the magnesium wheel from the heat generated by the sandpaper.
• Magnesium can oxidise with moisture over time; store spare wheels in a dry place.

Frequently Asked Questions

What advantage does a magnesium wheel have over an aluminium one?

Magnesium is approximately 35% lighter than aluminium with comparable stiffness. This translates to lower rotational inertia, improving the car's acceleration and braking by reducing the mass that needs to be set in motion or stopped at each corner.

Are these wheels compatible with any Slot.it axle?

The fixing is via M2 screw, which is the standard for Slot.it axles of 3/32" (2.38 mm) and 2.38 mm. Check the inner diameter of the wheel against your axle before purchasing if you have doubts about the specific version of your setup.

How many units are included in the pack?

The pack includes 2 wheel units.

Does this reference replace the old WH1186-Mg?

Yes. The reference SIW16510215M is the current designation for the item previously marketed as WH1186-Mg. The technical specifications are the same.

What tyre should I use with this wheel?

It depends on your car's configuration and your championship regulations. The wheel has a width of 10 mm and an outer diameter of 16.5 mm, so you should choose a tyre whose inner diameter and width are compatible with these measurements. Consult the Slot.it tyre catalogue to find the most suitable combination.

Can they be used on Scalextric or Ninco track?

The wheels are a mechanical component that does not depend on the type of track, but rather on compatibility with your car's chassis and axle. The type of track (universal or Sport) affects the guide and braids, not the wheels.

Slot.it SIW16510215M magnesium hollow wheels 16.5x10x1.5mm M2 grub screw, 0.9g per unit, pack of 2. Lightweight rotational mass reduction for 1/32 slot car competition builds. Direct replacement for WH1186-Mg. Ideal for Sport track racing setups requiring precision wheel and tyre assembly with minimal unsprung weight.