Shimano, Rear Derailleur, Rd-M310-L, Altus 7/8-Speed Direct Attachment Black

The Shimano Altus RD-M310 is a dependable 7/8-speed rear derailleur built for direct-attachment mounting. Its wide-link design adds rigidity for precise, consistent shifting, while oversized tensioner and guide pulleys help reduce noise and wear. Finished in black, it's a solid, affordable derailleur upgrade for entry-level and recreational mountain bikes.