Side spring bench L8.5x7E x4

Side Springs for Bolt System Chassis: Fine Adjustment for Competition Categories

The Lateral Spring Bench L8.5x7E x4 (ref. SRCRM0834) is a pack of four replacement springs specifically designed for chassis with the Bolt system. Its controlled geometry —length 8.5 mm, 7 coils, outer diameter 4.75 mm, and wire diameter 0.25 mm— makes each unit a precision part that directly influences the lateral behaviour of the car on track.

Technical Features

• Quantity: 4 springs per pack
• Spring Length: 8.5 mm
• Number of Coils: 7
• Outer Diameter: 4.75 mm
• Wire Diameter: 0.25 mm
• Compatible System: Bolt system

Function and Performance

In a chassis with Bolt system, the lateral spring is the element that regulates the pressure with which the guide "works" within the slot and, at the same time, conditions the lateral response of the front or rear axle during direction changes. A spring in good condition maintains the suspension geometry within design values; a worn or elastically fatigued spring causes erratic behaviours, loss of electrical contact, and irregular lap times.

With a length of 8.5 mm and 7 coils, this spring offers a specific working point: neither too soft nor too stiff for the categories in which it is homologated. Having a pack of 4 units allows for the replacement of all the springs on the car in a single intervention or provides immediate spare parts during a club day.

Compatibility

According to the manufacturer's specifications, this spring is valid for models equipped with the Bolt system belonging to the following categories:

• LMP1 — Toyota
• IMSA
• GT
• Other categories using the same chassis system

Before placing an order, verify that your model incorporates the Bolt system in its chassis. If you have any doubts, consult the technical documentation of the chassis or contact us.

Installation and Preparation

Replacing the lateral springs is one of the quickest maintenance operations on a competitive slot car. We recommend checking their condition after a certain number of running sessions, especially in championship environments where track conditions put maximum stress on the chassis. A spring that has lost its original tension can no longer recover it: the only correct solution is replacement.

If you are looking for a different response during tuning, keep in mind that this spring has fixed dimensions; hardness adjustment is achieved by combining it with the chassis elements for which it was designed, not by deforming it.

Ideal for…

This pack is aimed at club racers and enthusiasts competing in LMP1, IMSA, or GT categories with Bolt system chassis who want to keep their car's suspension in perfect condition. It is also a common workshop reference for those preparing third-party cars or managing a team's materials.

Frequently Asked Questions

What exactly does the lateral spring for the chassis do?

It regulates the pressure and lateral travel of the chassis, affecting the guide's contact with the slot, stability in corners, and the consistency of electrical contact through the braids.

When should I replace the lateral springs?

When you notice erratic behaviour in corners, loss of electrical contact, or when you visually inspect them and see deformation or fatigue. In competition, it is recommended to check them periodically even if there are no obvious symptoms.

Is this spring compatible with any chassis?

No. It is specific for chassis with the Bolt system. Verify that your model incorporates it before placing an order.

Can I use springs of different lengths to adjust the setup?

It is not advisable to mix springs with specifications different from those designed for the Bolt system. If you are looking for a different setup, check if the manufacturer offers official spring variants for that chassis.

Does the pack include 4 identical units?

Yes, all 4 units are identical: same length (8.5 mm), number of coils (7), outer diameter (4.75 mm), and wire diameter (0.25 mm).

The SRCRM0834 lateral spring set (pack of 4) is a precision replacement part for Bolt system chassis, compatible with LMP1 Toyota, IMSA and GT slot car categories. With a spring length of 8.5 mm, 7 coils, 4.75 mm outer diameter and 0.25 mm wire diameter, these springs ensure consistent lateral suspension behaviour and reliable electrical contact. Essential maintenance part for competitive slot car racing and club-level racing setups.