Ergon GC1 Bio Kork Grips For The City Rider Ergonomic grips will help improve your hand comfort while you're riding around the city. The Ergon GC1 Bio Kork Grips are developed for the ergonomic demands of riders using sweptback handlebars, usually found on city and touring bikes. They are made with cork that offers high-quality dampening performance and the grip center core is made of natural glass fibers. They feature aluminum lock-on clamps that can be 100% recycled and specially positioned textures for maximum comfort. Features Cork material offers high-quality dampening performance40% cork and 60% German-made rubber compound The grip center core is made of natural glass fibers Aluminum lock-on clamp which can be 100% recycled Specially positioned textures for maximum comfort Designed to be used on handlebars with a backward sweep of 30deg+ | Ergon | Gc1 Biokork Grips Black/tan Rohloff/nexus | Rubber