CHAPTER 16 AUTOCROSS AND RALLYCROSS AND OFF-ROAD RACING PART A( AUTOCROSS AND CLUBCROSS) Appendix 5- Technical Regulations
1. General 1.1. Racing Cars are prohibited.
2. Body 2.1. If one bumper is removed then both must be along with all supports. 2.2. Reinforcing the front apron is not permitted. 2.3. Any undertray must be provided with drainage holes to prevent accumulation of liquids.
3. Wheels
3.1. At the start of each heat or race, Vehicles must be fitted with mudflaps behind all four wheels extending to a minimum of 38mm either side of the tyre tread and to a maximum of 76mm above the ground.
3.2. All nuts securing roadwheels( except centre-lock types) must be made of steel and in thread contact over a minimum length of 1 1 ⁄ 2 bolt / stud diameters.
3.3. Extended or composite wheel bolts / studs are prohibited. 3.4. The use of safety wheel nuts, to prevent wheels pulling over standard nuts, is strongly recommended.
4. Oil Systems
4.1. Any oil tank located outside the chassis or main structure of a Vehicle must be covered with a protective coating( eg GRP)
5. Fuel Systems
5.1. These should be equipped with an effective method of stopping fuel supply which can be operated by the Driver when seated normally with seat belt secured.
6. Electrical Systems
6.1. Vehicles should be equipped with an ignition cut-off switch having a clearly marked and positive ON – OFF position which can be operated by the Driver when normally seated with seat belt secured. It must also isolate electric fuel pumps.
6.2. Any forward-facing lamps of more than 32 sq cm surface area must be adequately protected against glass breakage.
7. Safety
7.1. Closed Vehicles must have a means of access on either side of the Passenger compartment which can be operated from inside or outside. Access must be sufficient to remove an occupant without interference from any door locking devices.
7.2. They must have an operating windscreen wiper and washer system.
7.3. The following parts of Ch. 7 remain unmodified: Chassis, Seating, Suspension, Steering, Cooling, Weight / Ballast, Exhausts, Protecting Bulkheads.
Motorsport UK National Competition Rules 2026 Edition 1
Chapter 16 Part A( Autocross and Clubcross) Appendix 5- Technical Regulations
567