The continental grand prix 4000s ii 700c clincher folding road tyre oe 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 blackchili compound remains in place with conti with the black 4000 s ii adding a 28mm wide version to sit along side the 23 and 25mm this provides improved grip in poor conditions increased puncture protect and greater comfort conti have kept the vectran breaker for unsurpass