Pretty much from about 73/4 onwards(as per JR's Sidchrome Mustang) when Saloons started raced under Schedule E(basically IMSA or Sports Sedans) they went to the wide 14inch rims mostly from F5000 cars hence used whatever tyres the F5000's raced on, im pretty sure they were still treaded? and certainly no radial slicks! also I can remember my Dad sending away worn out wide tires and getting them re-treaded as a slick, the speedway guys done the same except they grooved them, from memory as a kid new wide race tyres were considerably expensive and hard to come by in the day(true Jacmac?).Originally Posted by Steve Holmes
Thanks Jac, this here is the earliest photo I have managed to find of a car on what appears to be slick tyres. This is from 1973, which coincides with what you said about Moffats GTHO. However, I can't say with 100% certainty if these really are slicks, or just treaded tyres that have worn down?
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