Porsche 935-77 chassis and K2 Flex

The Flex chassis that the Porsche 935-77 and K2 from Sideways have been waiting for

The reference SW935/A1 is the official flex chassis from Sideways for their Porsche 935-77 and Porsche 935 K2 bodies. It is a preparation piece designed for enthusiasts who want to maximise the performance of their cars on track, providing greater adaptability to changes in elevation and imperfections in the track.

Function and performance

A Flex type chassis works by absorbing the small irregularities of the track: when the car passes through an area where the track is not perfectly level or has a pronounced joint, the chassis flexes slightly instead of transmitting that rigidity to all four wheels. The practical result is that the contact of the braids with the track remains more consistent and the guide does not lose grip during transitions.

This translates into smoother and more predictable driving, especially noticeable on club tracks where repeated assembly and disassembly can create unevenness between sections.

Compatibility

This chassis is specifically developed for the Sideways bodies of the Porsche 935-77 and Porsche 935 K2. Its geometry and mounting points are designed to fit directly with these models, so the assembly is clean and without additional modifications under normal conditions.

Assembly and preparation

As a replacement or upgrade chassis, the assembly process involves removing the original chassis from the Sideways model and transferring the internal components —motor, rear axle, guide, braids, and other mechanics— to this new base. It is a task accessible to any enthusiast with basic experience in slot car preparation, although it is advisable to take the necessary time to ensure that all adjustments are centred and tension-free before the first track outing.

We recommend checking the height of the guide and the pressure of the braids once the chassis is assembled, as the flexible behaviour may require slight readjustments compared to the original chassis configuration.

Ideal for…

• Club drivers looking to gain consistency on tracks with joints or unevenness.
• Preparers wanting to enhance the performance of their Porsche 935-77 or K2 from Sideways without modifying the body.
• Enthusiasts experimenting with different chassis configurations to understand how structural rigidity affects dynamic behaviour.

Aspects to consider

A Flex chassis is not a universal solution for all tracks. On very flat and well-leveled tracks, the difference compared to a rigid chassis may be minimal. Its advantage becomes more evident on circuits with some irregularity or in track configurations that combine elevated sections with ground-level stretches.

Frequently asked questions

Is this chassis compatible with other Sideways bodies apart from the 935-77 and K2?

We cannot confirm that. The reference SW935/A1 is specifically described for the Porsche 935-77 and K2. For other Sideways bodies, there are specific chassis references that should be consulted before placing an order.

What is the difference between a Flex chassis and a rigid chassis?

A rigid chassis directly transmits any irregularity of the track to all four wheels, which can cause loss of contact of the guide or braids. A Flex chassis absorbs those tensions through a slight controlled twist of the structure, maintaining more consistent and uniform contact.

Do I need special tools to assemble this chassis?

In general, the usual slot preparation tools are sufficient: precision screwdrivers, the appropriate Allen key, and, if you want to fine-tune it to the maximum, a setup bench. No professional equipment is required for basic assembly.

Does Sideways manufacture this chassis in other materials or versions?

We do not have confirmed information on additional variants of this chassis. If you have questions about other versions, we recommend checking the updated catalogue in our store.

The Sideways SW935/A1 is a flex chassis designed for the Porsche 935-77 and Porsche 935 K2 slot car bodies. Compatible with Sideways slot cars, this flexible chassis improves track contact, guide stability, and trench performance on club layouts. An essential upgrade part for Porsche 935 slot car preparation and tuning.

Information not found

It has not been possible to verify the exact material of manufacture of the chassis, the type of compatible motorisation (Sidewinder, Inline or Anglewinder) or the specific dimensions of the structure. If you need this data before placing your order, we recommend contacting our team.