Radical SR-9 chassis ver.2

The Radical SR-9 ver.2 chassis, the foundation for performance

The Radical SR-9 ver.2 Chassis (ref. SC-6612A2) is the specific structural piece for the Scaleauto Radical SR-9 in its second version. Manufactured in standard hardness, identified by the black colour, this chassis defines the geometry of the entire mechanical assembly of the car: wheelbase, motor position, guide angle, and weight distribution. Replacing it or having a spare is a smart decision for any driver who wants to keep their SR-9 in optimal condition.

Main features

• Standard hardness (black): the standard version of the chassis, balanced between rigidity and absorption of track imperfections. A versatile option for both recreational use and initial experiences in club competition.
• Reference SC-6612A2: official Scaleauto part, designed and manufactured for the Radical SR-9 ver.2 model, ensuring factory fit and tolerances.
• Second version (ver.2): incorporates the corrections and design improvements that Scaleauto introduced regarding the original SR-9 chassis, resulting from accumulated competition experience and driver feedback.

Function and performance

The chassis is the skeleton of the slot car. Its rigidity directly determines how the vehicle behaves in corners, how the tyres work, and to what extent the motor transfers power to the ground. The standard hardness is the reference for balance: neither too rigid, which would make the car nervous, nor excessively soft, which would cause loss of contact and precision. For those looking to fine-tune even further, Scaleauto usually offers other hardness options, but the black version is always the logical starting point.

Compatibility and assembly

This chassis is specific to the Scaleauto Radical SR-9 ver.2. It is not interchangeable with the SR-9 ver.1 or other models in the Scaleauto range without prior verification. As an official spare part, it fits directly with the internal components of the car: motor mount, guide, rear axle, and original body. Assembly does not require modifications if the standard parts are retained.

Ideal for…

• Drivers who have suffered an impact and need to replace the damaged chassis without altering the car's setup.
• Enthusiasts who want to have a spare chassis for quick changes between track sessions.
• Preparers who wish to experiment with different internal configurations while maintaining standard hardness as a base reference.

Aspects to consider

Before acquiring this chassis, ensure that your Radical SR-9 corresponds to the version 2. The reference SC-6612A2 is exclusive to this variant. If you have doubts about your car's version, check the reference printed on the original chassis or contact our team; we will be happy to help you identify it.

Frequently asked questions

What is the difference between standard hardness and other chassis hardnesses?

Standard hardness (black) offers a balance between rigidity and flexibility, suitable for most tracks and driving styles. Other hardnesses, generally softer or stiffer, allow for adjustment of the car's behaviour under specific track conditions or driver preferences. The standard version is always the factory reference and the best starting point for any setup.

Is it compatible with the Radical SR-9 ver.1?

Not necessarily. The SC-6612A2 chassis is designed for the version 2 of the SR-9. Although the external dimensions may be similar, the internal tolerances and anchor points may differ. We recommend always verifying your car's version before placing an order.

Do I need special tools for assembly?

No. As an official Scaleauto spare part, assembly is done with the same basic tools as any slot preparation: precision screwdriver, Allen key, and pliers. No modifications or adaptations are required.

What track systems is the Scaleauto Radical SR-9 ver.2 compatible with?

The Scaleauto Radical SR-9 uses a Sport rail guide, compatible with Scaleauto and Slot.it tracks. With a guide adapter, it can also be used on Universal rail (Scalextric, Ninco). The chassis itself does not condition this compatibility, which depends on the mounted guide.

Can I reuse all the internal components from my original SR-9 in this new chassis?

In principle, yes, as long as the internal parts (motor, axle, mount, braids, and guide) are in good condition and correspond to ver.2. If any component was damaged along with the chassis, it is a good time to check them and replace any that are necessary.

The Scaleauto Radical SR-9 ver.2 replacement chassis (SC-6612A2) in standard hardness (black) is an essential spare part for slot car enthusiasts and club competitors looking to restore or maintain their SR-9 at factory specification. Designed exclusively for the second version of the SR-9, this chassis ensures precise fitment and consistent geometry for reliable performance on Sport-rail tracks. A must-have backup for any serious Scaleauto pilot.