Shimano RD-M581 Deore LX Rear Derailleur - 9-Speed

This Shimano rear derailleur delivers crisp shifting for critical gear changing on ever-changing terrain. Eleven-tooth pulleys run quietly and durably by alternating tooth contact between inner and outer chain plates. Alloy construction reduces weight while maintaining durability. Two fluorine-coated link pivot pins reduce friction for lighter, more precise shifting action. Compatible with all Shimano 9-speed HG cassettes, 9-speed shifters and 9-speed chains.