I am doing the Manx 3 hills, I have had turn up late my new tyres they are super soft ACB10 avon, I have used these for over a decade, but have never used them out of the box for sprinting, I have always warmed them a couple of times, can they be used virgin or will they be slippery? used my old ones tonight but they are spanked, half a second of a 650 bhp 4x4 Puma.