Piloted to two Marathon World Championship titles and the Leadville 100 course record! The Ergon GS1 combines comfort and support in a lightweight package for endurance athletes. The exclusive German produced rubber compound enables precise steering and control, all while still maximizing optimized damping features. The grip provides ideal comfort over long distances through ultimate pressure distribution and ride tuned flex. The GS1 is available in various Twist-Shift options. Carbon bar compatible.