On some old C50 compound Hankook Z211..I used them all year for various track days and auto-x.... and they were used when I bought them. Hell, they might be done heat cycling for all I know.... but they will make for an interesting tire-smoking youtube display soon. I'll probably pick up a set of RA1's for next year's events since the prices are dropping to clear them out.Originally Posted by Big Baller






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