[JCoop]

The Cobra "A" size tyres have a harder compound and are useable in rain. I got a set of the hand-cut Good Year C2 (Stock Car Specials) that are really slicks that may pass tech for a vintage event but are a much softer compound, definitely for serious track events and maybe get you back to the pits when it rains. A lot less money too, although no longer available in white letters. They come in yellow letters but can be painted white.

http://www.rogerkrausracing.com/gyCobra.html
http://www.rogerkrausracing.com/CobraSheet.html