Ergon GP1 Bicycle Handlebar Grip for Nexus/Rohloff Ergon's original and top selling grip, for Nexus/Roholoff Supportive wing and comfortable Kraton rubber pad for optimal pressure distribution Eliminates hand numbness and reduces upper body fatigue Available in small and large with the size being the circumference between thumb and forefinger; available in six versions depending on shifters Forged aluminum lock on clamp for fast and secure installation