UNIVERSAL conical spring for guide (EXTRA SOFT)

The extra soft universal conical spring from Sloting Plus that changes the way to set the guide forever

When Sloting Plus decided to rethink the guide spring from scratch, the result was this conical design that solves once and for all one of the most recurring problems in slot car preparation: the thickness of the spring when compressed. With reference SP117092, this extra soft spring is designed for those who demand maximum control in every detail of the setup.

Function and performance

The conical shape of this spring is not an aesthetic whim: it is an engineering solution. When compressed, the spring occupies only 0.35 mm of thickness, completely eliminating the mechanical interference generated by conventional springs when tightened between the guide and the chassis.

Until now, the usual practice to reduce that thickness was to cut the spring, an operation that compromised the parallelism of the ends and, with it, the correct return of the guide. With this conical design, that step disappears from the preparation process.

Compatibility

This is a universal mounting spring, compatible with standard slot guides on the market, including those used on Scalextric and Ninco track systems (universal rail). Its format and extra soft hardness make it especially suitable for cars that require a very smooth guide return, whether due to the characteristics of the chassis, the rail, or the driver's preferences.

Installation and preparation

• No prior cutting required: it mounts directly onto the guide's pin.
• The parallelism of the ends is guaranteed by the conical geometry itself, ensuring a uniform and deviation-free return.
• The extra soft firmness keeps the guide active at all times without adding unnecessary resistance to lateral movement.
• Ideal for fine-tuning the guide response on fast sections or on tracks with very smooth rails.

Common mistakes

The most common mistake with conventional springs is cutting them too much, losing the parallelism of the ends and generating an irregular guide return. With the SP117092, that problem does not exist: the conical geometry already accounts for total compression from the design. However, it is advisable to verify that the inner diameter of the spring is compatible with your guide's pin before installation.

Frequently asked questions

What advantage does the conical shape have over a conventional cylindrical spring?

When compressed, the coils of the conical spring nest inside each other, reducing the total thickness to just 0.35 mm. A conventional cylindrical spring, when compressed, stacks all the coils and occupies much more space, which can block the guide's movement or require cuts to reduce its height.

Why should this spring not be cut?

Because the conical geometry already resolves the thickness issue without the need to modify the spring. Cutting a cylindrical spring generates coils with irregular ends that break parallelism and negatively affect the guide's return. Here, that step is unnecessary.

What does "extra soft" mean in the hardness of a guide spring?

Hardness determines the force with which the spring pushes the guide towards the rail. Extra soft implies minimal resistance, allowing the guide to move very freely. It is the preferred option for fast tracks, very smooth rails, or drivers looking for a driving experience with very little resistance in corners.

Is it compatible with all slot cars on the market?

Being universal, it is compatible with the vast majority of standard slot guides on the market. Before installation, check that the inner diameter of the spring fits correctly with your guide's pin.

Can I use it in competition?

Yes. In fact, the control it offers over the guide return makes it a very interesting option for preparing competition cars, especially when looking to minimise any source of friction or irregularity in the front end.

The Sloting Plus SP117092 is a universal conical spring for slot car guide — extra soft version. Its unique conical shape compresses to just 0.35 mm, eliminating the need to cut the spring while preserving full end parallelism and correct guide return. Compatible with standard slot guides used on Scalextric and Ninco track systems. A precision tuning component for club racers and hobbyists who demand reliable, consistent guide performance.