45mm axle (X2)

Slot.it Axles of 45 mm: Precision in the Rear End Where It Matters Most

When track performance depends on tenths, the rear axle cannot be the weak link. Slot.it knows this better than anyone, which is why these axles with reference SIPA01-45 are manufactured with the same level of demand as the rest of their spare parts catalogue.

Technical Features

• Diameter: 2.38 mm (3/32")
• Length: 45 mm
• Treatment: ground and hardened
• Units per pack: 2
• Reference: SIPA01-45

Function and Performance

The grinding process ensures a clean and consistent geometry along the entire length of the axle, eliminating vibrations that penalise traction and cause premature wear of crowns and tyres. The hardening process, on the other hand, provides the necessary hardness to withstand the stresses of competition without deforming with use.

A bent axle or one with excessive play is one of the most common causes of performance loss on track, and it often goes unnoticed until directly compared to a new one. Replacing them preventively is a common practice among the most meticulous preparers.

Compatibility and Installation

The standard diameter of 3/32" (2.38 mm) is the most widespread in the 1/32 scale slot universe, compatible with most crowns, pinions, and wheel hubs designed for this standard. The length of 45 mm places it within the usual range for Sport track configurations, although it is always advisable to check the measurements of the receiving chassis before installation.

Installation is straightforward: the rear end components — crowns, collars, wheels — are inserted onto the axle, and adjusted with the appropriate spacing and tension according to the car's configuration. We recommend checking the complete alignment of the axle with the chassis after each replacement.

Installation and Preparation: Common Mistakes

• Not checking perpendicularity: a slightly twisted axle relative to the chassis causes uneven wear on the tyres and oscillation during operation.
• Over-tightening the collars: this can mark the axle and create weak points. Adjust firmly, not with excessive force.
• Reusing bent axles: if the axle shows any visible curvature, it is best to replace it directly.

Frequently Asked Questions

How many units are included in the pack?

The pack includes 2 axles of 45 mm.

Is it compatible with cars from other brands?

The 3/32" (2.38 mm) diameter is the most common standard in 1/32 scale, so it is compatible with a large number of cars and components that use this measurement. Always check the required length for your specific chassis.

How do I know if my axle needs replacing?

Run the car upside down on a flat surface and observe the rear wheels. If there is visible oscillation or vibration, it is likely that the axle is bent or worn. You can also roll the axle alone on a glass surface: any irregular movement indicates that it needs to be changed.

What is the difference between a ground axle and one that is not?

Grinding is a high-precision machining process that ensures a constant diameter along the entire length of the axle and a very smooth surface, which reduces friction and vibrations. An unground axle may have small variations that affect track performance.

How often should axles be replaced?

It depends on usage and track conditions. In regular competition, many preparers check them after each season or after any hard impact. In recreational use, replacement is less frequent, but it is advisable to inspect them if any changes in the car's behaviour are noticed.

Slot.it SIPA01-45 axle set — 45 mm hardened and ground steel axle, 2.38 mm (3/32") diameter, pack of 2 units. Standard 1/32 scale slot car rear axle, compatible with most crowns, hubs and collars using the 3/32" specification. Ideal for competitive slot racing, club racing and track day preparation. Available at Ministry of Hobby.