microSHIFT ADVENT RD-M619M-B Rear Derailleur - 9-Speed Medium Cage Black

microSHIFT ADVENT RD-M619M-B Rear Derailleur - 9 Speed Medium Cage Black. Designed with real life riders in mind the ADVENT rear derailleur packs trail-ready features into the most attainable wide range drivetrain on the market. The derailleur kinematics are also precisely tuned to use a more direct cable path making the shifting response consistent across all gears.