The MX-5 Club of Victoria recently revised their
championship rules regarding what constitutes "road tyres" versus "R Compound Tyres". This is what they've settled upon for the 2012/13 season.
Road TyresHankook RS2
Kumho KU36
Dunlop Direzza Z1
Toyo Proxes R1R
Bridgestone ADRENALIN RE001
R Compound TyresBridgestone RE55S, RE‐01R
Dunlop DZ03G, DZ02G, D01J, D93J
Falken RT615
Federal 595RS‐R
Kumho V700, V70A
Toyo Proxes 888
Yokohama A050, A048, AD08
Apparently the Federal 595RS-R and Yokohama AD08 tyres were queried for potential inclusion in the road tyres list, but it was decided that they qualify as R-specs.