The continental ride london gp attack force front and rear folding road tyre set is based on the famous gp4000s with small tweaks to benefit road racers continentals black chili and vectran technologies are radically applied to this uncompromised race tyre set each tyre has been specially designed and engineered for either the front or rear both tyres are made with vectran puncture protection a protective belt of super strong and extremely lightweight material beneath the bead