Shimano Sora RD-R3000 Rear Derailleurs Compatible with Shimano 9-Speed STI levers Fluoric coated link bushings Aluminum bracket body Painted finish Stainless steel B-axle Rear Derailleur Mount Type: Shimano Rear Direct Mount Drivetrain Speeds: 9 Chain Wrap Capacity (teeth): 43 teeth Largest Cog: 34 Color: Black Rear Der/Shifter Compatibility: Shimano Road Cage Length: Medium .