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 the proven aspects of the 4000 s ii remain unchanged vectran breaker for unsurpassed puncture protection blackchili compound for low rolling resistance and sensational grip handmade in germany constr