Sora derailleurs feature an advanced light action for low-friction shifting up or down the block. Wide link design for increased rigidity and precise gear shifts 11-tooth pulleys for reduced pulley wear and chain noise Pulleys feature sintered alloy bushings for smooth-running performance GS - 43 tooth total capacity, rear sprocket size range 11-34T SS - 37 tooth total capacity, rear sprocket size range 11-32T Compatible with 9-speed drivetrains
