This is the Continental Grand Prix 4 Season 700C Folding Duraskin Road Tyre-OE. Technology for the 'Hell of the North'. Styled on the GP4000, but with extra protection layers for harsh weather conditions. With two Vectran anti puncture layers beneath the tread, the GP4 Season is tougher than ever. Combined with Continental's tear resistant Duraskin mesh from bead to bead and max grip silica rubber compound, the GP4Season utilises all of the best Continental protection materials in one classy workhorse of a tyre. Used for the tough Paris-Roubaix classic bike race in a tubular format, this tyre is best for high mileage riders both for summer or winter usage. Lightweight 330 threads per inch / 3 ply race casing design also makes it an ideal choice for early season road races & sportives. The Black ''Max Grip Silica'' compound optimised for wet weather adhesion, low temperatures and extended tread life.