Key Features:Alfine chain tensioner for use with vertical dropoutsStable chain tension is achieved by using a single pulley guideFor use with single front chainringFor use with 16-23T rear sprockets.
Features:Alfine chain tensioner for use with vertical dropouts.Dual pulley design can be used with double front chainring.Maximum front difference 16 tooth.
Replacement Chain Tensioner Idlers with Fittings