microSHIFT Bar End Shifter Set - 11-Speed, Double/Triple, Compatible with Shimano Dynasys Compatible, BlackmicroSHIFT bar end shifters can work on TT bikes, commuter bikes, mountain bikes, and even work as down tube shifters. These versatile shifters have CNC machined mechanisms that result in crisp shifting's you will love. Expander plug compatible with handlebars with internal diameter of 19 21mm Product Specifics Rear Der Shifter Compatibility: Compatible with Shimano DynaSys Drivetrain Speeds: 11 Weight: 150 Double or Triple: Double Double or Triple: