2x carbon axle 2.38 x 55mm.

Tectime TT204 Carbon Axles: Millimetric Precision in Every Assembly

The axle is one of those components that goes unnoticed until something fails — or until you replace it with a better one and notice the difference on track. The TT204 from Tectime includes 2 carbon axles measuring 2.38 x 55 mm, a widely used size in slot racing preparations and for replacing worn or bent axles.

Features and Function

• Material: carbon, providing a combination of lightness and superior rigidity compared to conventional steel axles.
• Diameter: 2.38 mm.
• Length: 55 mm.
• Contents: 2 axles per pack.
• Reference: TT204, from Tectime.

Carbon reduces rotating mass compared to steel, resulting in a more agile response during acceleration and braking. Additionally, its greater rigidity minimises flex under load, a critical point in competition cars where the alignment of the pinion-crown gear assembly directly influences transmission efficiency.

Assembly and Preparation

Before installing the axle, it is advisable to check that the supports of the bracket or chassis are in perfect condition and without excessive play. A quality axle loses part of its potential if the bearings or bushings housing it are worn. Also, check the alignment with the crown gear to avoid premature wear and noise during operation.

For adjusting pinions and crown gears on carbon axles, carefully adjust the pressure of the set screws: carbon is rigid but does not tolerate excessive tightening in the same way as steel. Controlled tightening is sufficient to ensure fixation without damaging the material.

Ideal for…

• Tuners looking to reduce rotating mass in their competition builds.
• Replacement of bent or worn axles in 1/32 or 1/24 scale slot cars (depending on the bracket used).
• Enthusiasts building or modifying chassis who need axles of precise measurements.

Considerations

Always verify the compatibility of diameter and length with your chassis or bracket before assembly. The measurement of 2.38 mm is one of the most common in the slot world, but there are close variants — such as 2.5 mm or 3/32" — that can cause confusion. Measure with calipers if in doubt.

Frequently Asked Questions

What advantage does a carbon axle have over a steel one?

Carbon is lighter and, at small diameters like 2.38 mm, offers comparable or superior rigidity to steel. Less rotating mass means better response to speed changes, which is particularly noticeable in competition cars.

What scale is this axle designed for?

The measurement of 2.38 x 55 mm is compatible with multiple applications in 1/32 scale, although the definitive compatibility depends on the specific bracket or chassis you use. Always check the specifications of your setup.

Does the pack include 2 identical axles?

Yes, the TT204 pack contains 2 carbon axles with the same measurements: 2.38 mm in diameter and 55 mm in length.

Can I use this axle with standard bearings?

As long as the bearing has the correct inner diameter for 2.38 mm, yes. Check compatibility with your chassis bearings before assembly.

How do I avoid damaging the carbon axle when securing the pinion?

Use appropriately sized set screws and tighten with a precision Allen key without overdoing it. Moderate tightening is sufficient; carbon does not require the same force as steel, and excess can cause marks or local cracks.

Tectime TT204 carbon axles (2.38 x 55 mm, pack of 2) are a go-to choice for slot car builders and tuners looking to reduce rotating mass and improve drivetrain efficiency. The 2.38 mm carbon shaft delivers excellent stiffness-to-weight ratio, making it suitable for 1/32 scale competition builds. Compatible with standard bearings sized for 2.38 mm inner diameter.