Continental Grand Prix 4000S Road Tyre Twin Pack. The Continental Grand Prix series of racing clinchers is the top choice of serious race bike specialists all over the world, and has been for many years. The latest incarnation is the Grand Prix 4000S. The Continental Grand Prix series of racing clinchers is the top choice of serious race bike specialists all over the world, and has been for many years. The latest incarnation is the Grand Prix 4000S. S stands for sport, special and “schwarz“ – the german term for black. The all black Grand Prix 4000 S catches the eye with its big silver labels. It matches every high-end race bike perfectly and can do more than just look good. So buy this and you can Save £40.46 on Continental Grand Prix 4000S Road Tyre Twin Pack Now £49.44.