5.5. The recommended mounting is shown in App. 11 Chart 6.
6. Wheels 6.1. Vehicles may not be fitted with duplicated driving Wheels unless permitted by the Official Documents.
6.2. The Official Documents may permit the use of TUV Approved hub adapters / Wheel spacers up to a maximum of 30mm in depth.
7. Tyres
7.1. Tyres must be compatible with the Wheels and be acceptable to the Organiser unless a particular type and size of tyre is specified in the Official Documents.
7.2. Vehicles should carry a securely fastened spare wheel and tyre capable of replacing any one of the Wheels in use on the Vehicle unless stated otherwise in the Official Documents.
7.3. Vehicles can have more than four Wheels and tyres but they must be compatible. 7.4. All tyres must have at least the minimum legal tread depth on all tyres.
7.5. Competitive Safaris and Hill Rallies must specify tyre eligibility in the Official Documents. Tyres will be classified as All Terrain Mud Terrain or Extreme and will be judged against the AT and MT patterns leading manufacturers including BFG and General Tire.
8. Transmission
8.1. Vehicles must be equipped with an operable reverse gear and a non-torque biasing differential in full and free operation between the driving wheels unless:
a. A differential was not fitted by the manufacturer. b. The Official Documents specify otherwise.
8.2. Vehicles may use all wheel drive( unless the Official Documents specify otherwise) and may have traction afforded by Wheels, track, marine propellers or any combination of these.
9. Electrical Systems
9.1. Vehicles must not be equipped with more than two auxiliary lights which must be located in accordance with legal requirements except where the Event takes place wholly on private property.
10. Silencing
10.1. Vehicles must comply with the Noise levels in Ch. 7 App. 8 Art. 2 but the following parts of that Chapter remain unmodified by this section: Brakes, Steering, Cooling, Oil Systems, Fuel Systems, Weight / Ballast, Exhausts.
Technical Regulations- Safety
11. Competitive Safari Point to Point and Hill Rally
11.1. There are three classifications of Vehicle design which whilst requiring the same principles of roll-cage design may employ different mounting methods.
11.2. Monocoque Vehicles: These are of unitary construction employing an integral Chassis structure.
a.
They must mount their roll-cages in accordance with Ch. 7 App. 3 Art. 7 and fit a diagonal as provided by Ch. 7 App. 13 Diagrams 53 and 54 and must fit longitudinal door bars complying with Ch. 7 App. 3 Art. 12( side sections per Ch. 7 App. 13 Diagram 18).
Motorsport UK National Competition Rules 2026 Edition 1
Chapter 20 Appendix 10- Technical Regulations 758