BA Spring Washer

The washer that makes a difference in your slot setup

The BA Spring Washer (CRT-231) from Cumbre Racing Technologies is a replacement part designed to work alongside the suspension spring in the guide or chassis assembly of your slot car. It is supplied in a pack of 20 units, ensuring ample stock for preparation and tuning sessions without interruptions.

Function and performance

Spring washers act as a regulating element in the vertical suspension system of the guide. Their presence or absence, and even the stacking of several of them, allows for the adjustment of the spring preload, thereby influencing the guide's behaviour on the track: from a firmer and more direct response to greater absorption of track irregularities.

Having a stock of 20 units in the workshop drawer is a real advantage: you can test different configurations on the same car or have spare parts ready for multiple models at once.

Assembly and preparation

Assembly is straightforward: the washer is placed on the guide spring shaft before seating it in its housing. The number of stacked washers determines the effective stiffness of the suspension. We recommend starting with the car's factory setup and adding or removing washers based on the observed behaviour on track, always noting the changes to reproduce the optimal configuration.

Compatibility

The reference CRT-231 is designed for guide assemblies that use this type of BA spring. To confirm exact compatibility with your model, consult the technical sheet from the chassis manufacturer or the documentation for your car.

Common mistakes

• Forgetting to replace the washer after a review, leaving the spring without preload and resulting in a guide that is too soft.
• Stacking too many washers thinking that more stiffness is always better: excessive preload can reduce grip on tracks with imperfections.
• Mixing washers of different thickness or material without recording the change, making it difficult to reproduce a winning setup.

Frequently asked questions

How many washers are included in the pack?

The pack contains 20 units of the BA Spring Washer with reference CRT-231.

What is the exact purpose of the spring washer in a slot car?

It regulates the preload of the spring acting on the guide. By adjusting the number of washers, the rigidity of the vertical suspension can be fine-tuned, improving the guide's contact with the track on different types of surfaces.

Can multiple washers be stacked?

Yes. Stacking two or more washers increases the preload and stiffens the spring response. This is a common technique in the preparation of competition cars to adapt the setup to each circuit.

How do I know how many washers to use on my car?

There is no universal answer: it depends on the chassis, the spring, and the characteristics of the track. The most effective approach is to start with the original configuration and conduct progressive tests, recording the results with each variation.

Is it compatible with any rail system?

The washer itself is a generic mechanical part; compatibility depends on the spring housing in the specific chassis. Always verify with the technical documentation of your model before incorporating it.

The CRT-231 BA Spring Washer by Cumbre Racing Technologies is a precision replacement part for slot car guide suspension setups, supplied in a pack of 20 units. Ideal for fine-tuning spring preload and guide behaviour, it is a must-have consumable for serious slot car preparation and club-level competition tuning.