The clincher version of the evolved worlds best performance tire pushes the limits of versatility the worlds best tire 4 compounds for best speed grip durability and puncture protection kevlar reinforced corespun k for increased sidewall protection graphene is a revolutionary material in the form of a very thin nearly transparent sheet of pure carbon in its extreme form it is as thin as a single atom 1100 000 000th of a metre vittoria used directa plus graphene called g wh