The continental grand prix 4000s ii 700c reflective side wall clincher folding road tyre is the reference tyre in the road bike market and has gone through numerous stages of evolution continentals flagship tyre just got a facelift the discreet bead strip allows conti to put a reflective strip on the side wall of the tyre making you more visible at night without losing the blackchili tread performance conti have kept the vectran breaker for unsurpassed puncture protection plus with advanced