The Motor Sports Association (MSA) is pleased to announce regulation changes that widen the range of eligible tyres in historic stage rallying.
The issue of the availability of tyres complying with the existing regulations instigated a meeting of the chairmen of Historic and Rallies Committees, the Stage Rally Tyre Working Group, representatives from tyre manufacturers/suppliers and the MSA Executive.
Proposals from that meeting have now been approved by the respective committees and subsequently by the MSA’s Executive Committee for immediate implementation.
Rob Jones, MSA Chief Executive, said: “This regulation change will give competitors a wider choice of suitable and eligible tyres, and will make the administration and application of the regulations easier to understand and apply. Mindful of the need to address this fundamental issue, we have expedited this for immediate implementation ahead of the final asphalt round of this year’s MSA British Historic Rally Championship, the Rally Isle of Man.”
The new regulations are as follows:
Wheels, Tyres and Brakes 49.10.1. Wheels and tyres must be fitted in compliance with L3., 49.6. except as follows, 48.5.1., 48.5.2., 48.5.4., 48.5.6-8. and 48.5.10.-14. and;
49.10.2. For Categories One, Two and Three the diameter of wheel may not differ from that originally fitted by more than 10%.
49.10.3. For Categories One, Two and Three the complete wheels (flange + rim + tyre) are free providing that they are housed within the permitted bodywork and that they do not exceed the following widths in relation to the cubic capacity of the car:Up to 1150 cc: 7inOver 1150cc and up to 1600 cc: 8inOver 1600 cc: 9in.
49.10.4. For Category Four, and vehicles competing under 49.2., wheels and tyres must comply fully with FIA Appendix K Regulations for Cars in Rallies.
49.10.5. The fitting of a dual master cylinder or any other type of device providing a simultaneous action on all four wheels and divided action on two wheels is permitted, provided the original brake pedal and pivot point are used and they cannot be adjusted to affect brake balance by either the Driver or the Co-Driver when normally seated in the car.
