. The Hope CX Retainer Ring has a narrow/wide tooth configuration making it the perfect lightweight option for your CX bike's single ring set-up
Features: The narrow/wide chainring is designed to retain the chain without the need of a chain device 110PCDQuieter drivetrain & less drag CNC machined 7075-T6 aluminium provides the perfect blend of lightweight & strength Compatible with 9spd, 10spd & 11spd set-ups Hard anodised finish makes them ultra durable & increases longevity Buy Hope Components from Chain Reaction Cycles, the World's Largest Online Bike Store.