The rules for the use of Yokohama A021r tyres on racecars in production groups have been amended, please see

    SEGTO is the governing body for the rules for the preparation and modification of race vehicles that are raced at all SEGTO affiliated club/race circuits. 

These rules enable any driver with a SEGTO race licence to race at any SEGTO affiliated club/race circuit. 

Each affiliated club/race circuit may also have extra rules and regulations that only apply to that particular club/race circuit.