Check the listing for details. microSHIFT ADVENT RD-M619M-B Rear Derailleur - 9-Speed, Medium Cage, Black. Color: Black, Condition: New. Listed at 43.97 USD. 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.Upgraded cage design provides improved chain wrap and retention. Perfect choice for commuter or touring bikes that can benefit from using a wide range gearing system. Direct path cable routing for smooth and responsive shifting. Compatible with 11-42t and 11-46t 9-speed cassettes. Item Specifications: Rear Der/Shifter Compatibility, microSHIFT ADVENT, Rear Derailleur Mount Type, 10x1 Standard, Drivetrain Speeds, 9, Chain Wrap Capacity (teeth), 37, Cage Length, Medium, Color, Black,.