Funn clinch expander sprocketmake your one by 1x drivetrain more versatile with the funn clinch expansion sprocket it allows you to expand the range of your current 10 speed cassette making the gruelling climbs that little bit more bearable with the combination of a narrow wide chainring and the clinch expansion sprocket your one by 1x drivetrain will be ready to tackle tougher climbs and hit the rougher terrain on the way back down features material al7075 full cnc weight 80gbuyfunn