This rear derailleur provides fast, stable and precise gear shifting performance thanks to its integrated ratchet-and-pawl clutch system. This system gives you dependable shifting performance, is easy to adjust and fine-tune while also being fully serviceable. Durable, Precise and Smooth Shifting 1x9-Speed Clutch 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 to use a more direct cable path, making the shifting response consistent across all gears. With bombproof construction capable of handling the most real mountain bike abuse, Advent competes favourably with drivetrains that cost twice as much. Key Features: Reliable ratchet-and-pawl clutch is easily adjustable and repairable Direct path cable routing for smooth and responsive shifting Compatible with 11-42T and 11-46T 9-speed cassettes Compatible with Advent shifters only