UNIVERSAL pulley Ø10 shaft 2.38 mm. RED

A pulley that makes a difference in your slot car's transmission

The Sloting Plus Ø10 red Universal Pulley (ref. SP079932) is one of those small parts that has a direct and measurable impact on the car's behaviour on track. Made from duralumin and featuring a conical inner design, this pulley has been conceived to make the most of belt transmission, with a versatility that few parts of its kind can match.

Technical specifications

• Material: Duralumin
• Outer diameter: 12.5 mm
• Inner diameter (shaft): 10 mm (Ø10)
• Compatible shaft diameter: 2.38 mm
• Thickness: 2.49 mm
• Weight: 0.58 g
• Contents: bag with 2 units
• Includes: M2 x 3 mm allen grub screw

Function and performance

The conical inner design of this pulley is its main technical argument. Thanks to this geometry, the belt —whether 1 mm or 1.5 mm in diameter— seats naturally and efficiently, without unnecessary play and without excessive tension. The result is a cleaner and more consistent transmission that translates directly into more homogeneous traction lap after lap.

Another point to highlight is its misalignment tolerance: one of the most common problems in belt transmission systems is the slight deviation between the front and rear axles. This pulley manages that misalignment without the belt skipping, which improves the reliability of the assembly and reduces setup time between sessions.

Compatibility and installation

Designed for 2.38 mm shafts, it is compatible with most common belt transmission configurations in competitive slot racing. The M2 x 3 mm allen grub screw included in the bag facilitates fastening without the need to search for additional hardware. Installation is straightforward and does not require specialized tools beyond an appropriately sized allen key.

The red finish is not just aesthetic: it allows for visual identification of this pulley within Sloting Plus's colour coding system, facilitating workshop organization and quick part selection during a preparation session.

Common mistakes

Before installing the pulley, it is advisable to verify that the shaft diameter is indeed 2.38 mm. Using this pulley on shafts of different measurements may cause play or excessive tension, compromising both the transmission and the integrity of the part. Similarly, ensure that the belt used is either 1 or 1.5 mm in diameter: belts outside of that range will not take advantage of the conical profile and will reduce the efficiency of the assembly.

Frequently asked questions

Can I use this pulley with belts of different diameters?

The conical design is optimized for belts of 1 mm and 1.5 mm in diameter. These are the sizes for which the pulley operates at full efficiency. Other diameters may work partially, but will not take advantage of the benefits of the inner profile.

What advantage does the conical profile offer over a conventional pulley?

The conical profile allows the belt to seat progressively and self-centre, reducing the risk of skipping and improving traction. Additionally, it tolerates small misalignments between axles better without penalizing performance.

How many pulleys are included in the bag?

The bag contains 2 units, allowing you to equip both axles of the same car or have a spare for the workshop.

Is the allen grub screw already mounted in the pulley?

No. The M2 x 3 mm allen grub screw is included loose in the bag, ready for you to install during the installation process.

What type of installation is this pulley designed for?

It is designed for belt transmission systems in slot cars for preparation or competition. It is compatible with sidewinder, inline, or anglewinder configurations, as long as the shaft is 2.38 mm and the appropriate belt is used.

Does the red colour have any technical implications?

The colour identifies the reference within the Sloting Plus system, facilitating classification in the workshop. It does not imply any difference in material or hardness compared to other pulleys of the same line in different colours.

The Sloting Plus SP079932 Universal Pulley Ø10 mm in red is a high-precision duralumin pulley designed for 2.38 mm axles, compatible with 1 mm and 1.5 mm belts. Its conical inner profile ensures efficient belt seating, improved traction, and greater misalignment tolerance — making it a reliable choice for slot car racing preparation and tuning. Pack of 2 units, allen grub screw M2 x 3 mm included.