|
Members who are using tyres from
previously approved Group S and N tyre lists need to be aware that the
dispensation which allows that usage expires on 30 June 2008.
After that date, only those
tyres listed in Section 8 – Vehicle Eligibility – Approved Tyre List –
Group N & S, of the CAMS Manual of Motor Sport may be used.
The Manual states that all Group
Sa, Sb and Sc cars are restricted to a tyre aspect ratio of 60%, with
some exceptions for Group Sc (State Historic Eligibility Officers can
advise on which Group Sc cars are eligible to use tyres of a lower
aspect ratio than 60%).
The latest online issue of the
CAMS Manual is 1st April 2008 – it includes the Approved Tyre
List – Group N & S.
The CAMS Manual lists 25 tyres
of 60% aspect ratio; seven are Dunlop (D84J, D01J, DZ02G, DZ03G, CR65,
CR82 and CR311), two Yokohama, one Bridgestone, two Goodyear Blue
Streak, two Toyo, three Kuhmo, three Avon, one Michelin, two Hoosier,
one American Racer and the Silverstone FTZ RR (T5 compound only).
The bulletin lists 11 tyres of
65% aspect ratio for Sa cars.
No other tyre can be used in
Groups S or N unless its use is promulgated in a CAMS Technical
Bulletin. CAMS Technical Bulletins can be accessed through the CAMS
Historic Racing website.
If you want to have a tyre added
to the approved tyre list, you must supply the tyre information to the
eligibility officer (Greg King for NSW, John Caffin for VIC), who will
take the application to the Historic Eligibility Committee for
consideration.
Trust that clears it up,
regards,
Brian Weston
President - GSRA
 |
