The Continental Grand Prix 4000s Folding Road Tire delivers lower rolling resistance, better flat protection, and lighter weight. These make a great all-weather training and racing tire the all black Grand Prix 4000S catches the eye with its big silver labels. Aggressive and posh alike it matches every high-end racebike perfectly. With the reduction to black and silver the Grand Prix 4000S does not clash with the frames` colour or rim stickers. S stands for sport, special and "schwarz" – the german term for black.But the Grand Prix 4000S can do more than just look good. With the new Black Chili Compound rolling resistance is reduced by 26%, grip is increased by 30% and mileage is increased by 5%. So for reliability, longevity and all out performance for your race machine, the GP 4000s is the only choice.