M2.5 Stopper Pin 10 pcs

Ten Mitoos aluminium axle stoppers to keep the axle exactly where it should be

The axle stopper is one of those small parts that makes a huge difference in the car's behaviour. Its mission is to secure the rear axle in the correct position and prevent any lateral movement during the race. Axial play can lead to a lack of traction, uneven tyre wear, or, on wet or technical tracks, even losing control in fast corners. With these Mitoos stoppers, that problem is eliminated.

Technical specifications

• Material: machined aluminium
• Inner diameter: suitable for 3/32" (2.38 mm) axles
• Outer diameter: 6 mm
• Width: 3 mm
• Fixing system: M2.5 tightening screw
• Screws included: 10 DIN 913 M2.5×3 screws (one per stopper)
• Pack contents: 10 units

Function and performance

Aluminium offers an optimal balance between lightness and rigidity. Unlike plastic stoppers, aluminium does not yield under the tightening of the screw nor does it deform with the heat generated during a long running session. The DIN 913 screw —with an internal hexagon head— ensures uniform tightening and allows for loosening or adjusting the axle position with a simple Allen key, without damaging the part.

The pack format with 10 units is particularly practical for regular preparers or club teams: you always have a spare on hand if a stopper suffers damage in an accident or if you need to reconfigure the track width between different chassis.

Compatibility

These stoppers are compatible with any 3/32" (2.38 mm) axle, the most widely used standard in 1/32 and 1/24 slot racing. They work on both steel and tungsten axles. The reference CXM115 is commonly used in setups on resin chassis, competition plastic chassis, and aluminium bases where a stable and repeatable axle position is desired.

Installation and preparation

Installation is straightforward: slide the stopper onto the axle to the desired position and tighten the DIN 913 screw with the corresponding Allen key. It is advisable not to over-tighten to avoid marking the axle, especially if it is tungsten. If the stopper is to be used as a wheel stop, position it at just the right distance to leave the minimum necessary play without rubbing against the body or chassis. Before each race, check that the tightening remains secure: accumulated vibration can loosen it slightly during long sessions.

Common mistakes

• Over-tightening: this can deform the axle or hinder turning. Apply just enough force until the stopper does not move when pulled.
• Not using a new screw: if the DIN 913 screw has been tightened several times, it may lose grip. The pack includes new screws, use them.
• Forgetting to check lateral play: install the stopper and manually rotate the axle before returning the car to the track. Any rubbing will be immediately noticeable.

Frequently asked questions

What axle diameter do these stoppers accommodate?

They are designed for 3/32" (2.38 mm) axles, the most common standard in 1/32 and 1/24 slot racing.

Can I use them on tungsten axles?

Yes, but apply the tightening carefully. Tungsten is harder than conventional steel, but excessive screw pressure can mark the surface of the axle and affect its concentricity.

Does the pack include the tightening screws?

Yes. Each of the 10 stoppers comes with its DIN 913 M2.5×3 screw, so the pack is complete for direct assembly.

How many stoppers do I need per car?

Typically, between 2 and 4 are used per rear axle, depending on the setup (wheel side stops, crown gear fixation, etc.). With 10 units, you have enough to equip several cars or have spares available.

Do they also work on the front axle?

Yes, as long as the front axle is also 3/32". They are equally useful for securing the front wheels and preventing lateral movement.

Mitoos CXM115 aluminium axle stoppers M2.5 for 3/32" slot car axles. Pack of 10 units including DIN 913 M2.5×3 grub screws. Lightweight and precise, ideal for 1/32 and 1/24 slot car competition builds. Compatible with steel and tungsten axles on resin and plastic chassis.