microSHIFT ADVENT RD-M619M-B Rear Derailleur - 9-Speed Medium Cage BlackmicroSHIFT 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. TECH SPECS Rear Der Shifter Compatibility microSHIFT ADVENTRear Derailleur Mount Type