Vittoria corsa speed g tubular road tyrea super fast tubular tyre engineered for pure speed events and profiled to benefit from the latest wide aero rims by using graphene vittoria has created a tyre that has incredible grip but low rolling resistance graphene explainedgraphene 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 11 000 000 000th of a metre vittoria uses directa plus graphene ca