Rear spring Bench L5x4E x4

Four rear pod springs for Bolt system to fine-tune the rear suspension of your slot car

The Rear Pod Spring L5x4E x4 (ref. SRCRM0830) is a pack of four springs specifically designed for the rear pod with Bolt system. A small component with a direct and measurable impact on the car's behaviour: the stiffness of the rear axle, load transfer in corners, and traction on exit largely depend on the spring you mount here.

Technical specifications

• Pack contents: 4 x rear pod spring «Bolt system»
• Spring length: 5 mm
• Number of coils: 4
• Outer diameter: 4.85 mm
• Wire diameter: 0.25 mm

Function and performance

The rear pod springs affect the vertical stiffness of the rear axle. A shorter spring or one with a finer wire softens the suspension response, favouring tyre contact with the track on uneven surfaces. This reference, with its 4 coils at 5 mm in length and 0.25 mm wire, is positioned in a hardness range designed to offer a balance between stability and traction grip.

In Bolt system setups, adjusting the rear springs is one of the key steps in suspension tuning. Changing the stiffness of the rear spring directly affects the behaviour on corner entry and exit: a softer spring provides more rear grip, while a harder one stabilises the car at high speeds. Having several references on hand — like this pack of four units — allows you to test and compare without delays.

Compatibility

These springs are compatible with all models that incorporate the Bolt system in the rear pod, including categories such as:

• LMP1 «Toyota»
• IMSA
• GT
• Other categories with Bolt system

Check your chassis or pod documentation to confirm compatibility before installation.

Installation and preparation

Changing springs in the rear pod is a straightforward operation that does not require special tools, but it does require attention to the spring seat to avoid misalignment. Before mounting, ensure that the pod is clean of lubricant residues in the spring contact area, as any particle can alter the actual preload. Once mounted, check that the spring sits evenly at both ends.

The pack includes four units, allowing you to equip the entire rear axle with springs from the same batch — ensuring uniformity — and keep spare units for the next tuning session.

Frequently asked questions

What is the purpose of changing the rear pod spring?

The rear spring regulates the stiffness of the rear suspension. Adjusting it allows you to modify the car's behaviour in corners: softer for more rear grip, harder for more stability on straights and to reduce body roll.

Why does the pack include four units?

Four units allow you to equip both sides of the rear axle and have spare units for tuning tests during race or practice sessions, without needing to order more before each event.

Can I combine this spring with springs of other sizes on the same axle?

It is not recommended. Mixing springs of different lengths or stiffness on the same rear axle creates asymmetric behaviour that complicates car control. It is usual to always mount the same reference on both sides.

Is it compatible with all chassis that use the Bolt system?

According to the provided information, this spring is valid for models with the Bolt system in LMP1 Toyota, IMSA, and GT categories, among others. We recommend checking your pod's technical sheet to confirm if you have any doubts about your specific model.

How much does changing the spring really affect on-track performance?

In club racing, suspension tuning makes noticeable differences, especially on tracks with many tight corners. The rear spring is one of the most accessible and impactful adjustments for lap time.

The SRCRM0830 is a set of four rear axle pod springs for Bolt system slot car chassis, featuring a 5 mm length, 4 coils, 4.85 mm outer diameter and 0.25 mm wire diameter. Compatible with LMP1 Toyota, IMSA and GT category models using the Bolt system. An essential tuning component for slot car racing enthusiasts looking to fine-tune rear suspension stiffness and improve on-track performance.