8. Suspension and Steering 8.1. The operating method and the design of the suspension system are free.
8.2. Suspension parts may not be attached to the Spaceframe at those elements making up the major components of the ROPS i. e. main / front hoop and main braces.
8.3. The springing medium must not consist solely of bolts located through flexible bushes or mountings but may be of fluid type.
8.4. There must be movement of the wheels to give suspension in excess of any flexibility in the attachments. 8.5. Chromium plating of steel suspension members is prohibited. 8.6. All suspension members must be made of homogeneous metallic material. 8.7. All vehicles must be fitted with a steering column of a collapsible type.
9. Fuel Tank / Fuel 9.1. Fuel Systems must comply with Ch. 7 App. 4.
9.2. No part of the fuel tank to be located less than 300mm from the bodyshell in both lateral and longitudinal directions, and must be outside the driver’ s compartment, and be separated from the driver’ s compartment by a metal firewall or container, both of which must be flameproof and liquid-proof.
9.3. Fuel fillers passing through the cockpit must be isolated and fitted with non-return valves at the fuel tank.
10. Exhaust and Silencing 10.1. The orifices of the exhaust pipes must be between 100mm and 450mm above the ground. 10.2. Exhaust gas may only exit at the end of the exhaust system. 10.3. All exhaust gasses including wastegate outlet must pass through the main exhaust system. 10.4. No part of the chassis may be used to evacuate exhaust gases.
11. Weights
11.1. The weight of the car is measured with the driver on board wearing their full racing apparel, and with the fluids remaining at the moment at which the measurement is taken.
11.2. The minimum weight must be: 4 Wheel Drive 1300kg 2 Wheel Drive 900kg.
Motorsport UK National Competition Rules 2026 Edition 1
Chapter 16 Part B( Rallycross) Appendix 11- Rallycross Spaceframe Technical Regulations
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