microSHIFT Right Bar End Shifter, 9-Speed, ADVENT Compatible OnlyImagination is the only limitation to how much the microSHIFT bar end shifters can do. Their small minimalistic designs are packed with precision machined mechanism that allows you to shift accurately with either index or friction mode. Go on any adventure without worries for mechanical issues. Expander plug compatible with handlebars with internal diameter of 19 21mm Product Specifics Rear Der Shifter Compatibility: microSHIFT ADVENT Drivetrain