The continental grand prix 4000 s ii vectran tubular tyre is a road racing tubular tyre that has be modelled on the famous gp4000s ii clincher tyre this is a seamless tubular which scores on easy fitting and speed due to the blackchili tread compound this wheel offers you an unrivalled collective of reliability great handling and long life this continental tyre has vectran protection which is an unbelievably strong thermoplastic fabric that is placed under the tread of the tyre offeri