ETRTO Width and circumference: 32 - 622 Suitable for racing bikes Color: Black and Transparant Wheel Size: 28 Inch/71,12 CM Model: Grand Prix 4-Season Continental: The toughest &';performance&'; tyre on the market Thanks to its DuraSkin(TM) anti-tear fabric and two Vectran anti puncture strips, the Grand Prix 4-Season holds up under extreme conditions. In the Paris- Roubaix race, the "Hell of the North", cyclists equipped with DuraSkin(TM) enhanced tyres have the fewest tyre related problems during the race. Incorporating our special wear resistant carbon compound, the tyre is characterized by very good mileage performance as well as excellent adhesion on wet roads and at low temperatures. With 23, 25, 28 & 32mm versions, the Grand Prix 4-Season makes it possible to select the right tyre for various road qualities, type of bike and comfort requirements. A double Vectran(TM) Breaker belt under the tread raises the puncture and cut protection to the highest level available on the market. Featuring a total of five plies beneath the tread, plus a sixth Duraskin layer, it&';s ideal for rough sportives and general bad road conditions. Styled on the GP4000 S II, but with extra protection layers for harsh weather conditions DuraskinA(R) cut-resistant layer from bead to bead plus 2 extra Vectran breakers Black "Max Grip Silica" compound optimised for wet weather adhesion, low temperatures and extended tread life.