microSHIFT Advent Clutch 9 Speed Rear DerailleurmicroSHIFT Advent Clutch 9 Speed Rear Derailleur 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 clutch uses a proprietary ratchet and pawl tension assembly for more durable and stronger chain management over rough terrain. This modular design is also easily adjustable and fully repairable. The derailleur kinematics are also precisely tuned