Shimano RD-M310 Altus Rear Derailleur - 7/8 Speed

Shimano Altus Rear Derallieurs Cage Length: Long Drivetrain Spacing: Shimano/SRAM 8 Intended Use: Mountain Shifter/Rear Derailleur : Shimano Largest Cog: 34 teeth Chain Wrap Capacity: 43 teeth Derailleur Action: Top-Normal (Traditional) Silver version shown