The Ergon GC1 Nexus Grips are designed for city bikes with Shimano Nexus hub gears. With city bikes, the ends of the handlebars are angled further back. This puts arm, hand and wrist in an unnatural, tiring position. The ergonomic design of the GC1 grips support a natural position of hand and wrist. This prevents a kink in the wrist. This provides a high degree of comfort for the hand and prevents fatigue and numbness during long bike rides. In addition, the rubber compound ensures an even distribution of pressure across the contact points of the hand. This allows you to enjoy your bike rides without a care in the world. What size do I need? If you don't know what size grip you need, you can do the Ergon Grip Selector here.