UNIVERSAL spring for suspension L7/3-M20

A small spring that makes a difference in your suspension behaviour

In the fine tuning of a slot car with suspension, the spring is one of the elements that most influences how the chassis responds to track irregularities and the efficiency of power transmission to the ground. The SP117024 from Sloting Plus is a universal stainless steel spring, with a 3 mm inner diameter and a 7 mm length, with medium hardness. It comes in a pack of 6 units.

Technical specifications

• Material: Stainless steel
• Inner diameter: 3 mm
• Length: 7 mm
• Hardness: Medium
• Contents: Pack of 6 units
• Compatibility: Universal (suitable for Scalextric, Ninco and other systems with compatible geometry)

Function and performance

Suspension springs in slot cars control the stiffness of the chassis support system on the axle. A medium hardness like that of this SP117024 offers a balance between grip and stability: the chassis can follow the track profile without losing contact on elevation changes, but without excessive flexibility that penalises cornering precision.

Being made of stainless steel, it withstands continuous use well without deforming or losing its elastic properties over time, ensuring that the car's behaviour remains consistent between sessions.

Compatibility and installation

This spring is classified as universal by Sloting Plus, indicating its validity for most suspension setups in slot cars on Scalextric and Ninco track. Before installation, it is advisable to always check that the spring seat in the chassis accepts an outer diameter consistent with the 3 mm inner diameter of this reference.

The pack includes 6 units, allowing for the equipping of several cars or having spare units on hand to adjust hardness on the fly during a preparation session.

When to choose medium hardness?

The choice of spring hardness depends on the chassis weight, track type, and driving style. Medium hardness is a common starting point for most setups: neither too soft (which can cause roll and loss of precision) nor too hard (which reduces contact of the braids and tyres on uneven tracks). It is especially useful on mixed tracks or for drivers who are still adjusting their setup.

Frequently asked questions

What track systems is this spring compatible with?

Sloting Plus classifies it as universal, primarily suitable for cars running on Scalextric and Ninco track. For other systems, it is advisable to verify that the geometry of the spring seat in the chassis matches the measurements of the SP117024 (Ø 3 mm inner, 7 mm length).

How many units does the pack contain?

The pack contains 6 units of the SP117024 spring.

How does medium hardness differ from soft or hard?

Medium hardness offers a balance between grip and stability. Soft springs allow for greater chassis movement and more contact on uneven tracks, while hard springs provide more stiffness and precision on very flat tracks. Medium hardness is a good starting point for most configurations.

Can it be mixed with springs from other brands?

In principle, yes, as long as the measurements are compatible. The important thing is that the inner diameter and length fit correctly in the chassis seat. However, to maintain homogeneous behaviour, it is recommended to use springs of the same reference in the same car.

Does stainless steel offer advantages over other materials?

Stainless steel is resistant to corrosion and maintains its elastic properties with prolonged use. This translates to more consistent behaviour over time, with no perceptible degradation between sessions.

The Sloting Plus SP117024 is a universal stainless steel suspension spring for slot car chassis, featuring a 3 mm inner diameter and 7 mm length with medium hardness. Sold in a bag of 6 units, it is compatible with Scalextric and Ninco rail systems. Ideal for slot car preparation, chassis tuning and suspension setup, this spring helps achieve consistent handling and optimal tyre and braid contact on the track.