Continental grand prix road bike tyres 25c pairthis pair of road tyres from continental have been influenced by the renowned gp4000 sii model, to give you a tyre that is dependable, reliable and offers exceptional control. Constructed using a blackchili compound and featuring poly x anti puncture technology, it also benefits from 180 tpi casing and is incredibly lightweight, making it ready to handle whatever challenges you meet on the road. Featuresincluded 2x continental grand prix road bike 25c tyresuse roadcompound natural rubber compoundtyre bead foldingtyre type clinchermax. Inflation pressure 120 psicasing type 3 180 tpi poly x breakertubeless ready nosize width 700 25cweight 250gtechnologiesblackchili compound this tyre compound sits at the highest level of rubber tyre compounds from continental. Featuring the perfect balance between speed, grip and lifespan while far exceeding what other brands and models on the market can offer in terms of performance.polyx breaker this breaker consists of an extremely resistant polyester fibre, which is woven tightly in a crosswire formation to create a very high fabric density to exceptional resistance to sharp objects and resistant to punctures. Rolling resistance is not affected by the polyx breaker and is very lightweight.buy continental wheels tyres from chain reaction cycles, the world's largest online bike store.