SHIMANO RD-3400 Sora Rear Derailleur (SS Short Cage, 9-Speed, Silver) Cage Lengths: SS-short, Chain Wrap Capacity: 29teeth, Derailleur Action: Top-Normal (Traditional) Derailleur Color: silver/black, Drivetrain Spacing: Shimano/SRAM 8, Largest Cog: 27teeth Shifter/Rear Derailleur : Shimano, Speeds: 8sp, Weight: 265g