Shimano Rear Derailleur Alivio M3100 9spd

Shimano 9-speed Alivio rear derailleur.Key Features• Suitable for on- and off-road for 9-speed drive trains• Super low-profile Shadow design to reduce risk from impacts• 11-tooth pulleys for reduced pulley wear and chain noise• Advanced light action design with low friction fluorine coated link pivot bushings• SGS long cage for use with 32 to 36 tooth low rear sprockets, total capacity 45 teeth• Top-normal swing design