The grand prix 4000 s ii is the reference tyre in the road bike market and has gone through numerous stages of evolution our flagship tyre now gets a facelift the discreet bead strip allows us to colour coordinate the tyre to match your bike perfectly without losing the blackchili tread perfomance we have also expanded the size range with an additional 28mm version providing improved grip in poor riding conditions increased puncture protection and greater comfort the proven aspect