Shimano Altus RD-M370-SGS 9 Speed Long Cage Black Rear Derailleur support devices so be sure you have

so be sure you have the right flag pole size

Capacity: 775 – 925 cubic inches

and the built-in clamp resists twisting

Rotor Type: One Piece

Shimano Altus RD-M370-SGS 9 Speed Long Cage Black Rear Derailleur support devices so be sure you haveSHIMANO ALTUS 9 Speed Rear Derailleur The 9 speed SHIMANO ALTUS M370 rear derailleur use its MEGA 9 DRIVE TRAIN design to deliver smooth, light action shifting performance. Features: Low profile concept with Double Servo panta technology Wide Link for durability and precise shifting Specifications: Cage Length: Long Color: Black Drivetrain Speeds: 9 speed Largest Cog (teeth): 34 Rear Der Shifter Compatibility: Shimano Mountain Rear Derailleur Mount