M-series rear derailleurs are designed to work with 7 and 8-speed Shimano-compatible mountain and road shifters. These legendary M26 rear derailleurs put cyclists of all ages back on their saddles with as little frustration as possible. FEATURES : Robust composite and steel construction Compatible with Shimano 7 and 8-speed mountain and road systems SPECS : Color: Black Largest Cog: 36 Rear Derailleur Mount Type: 10x1 Standard Chain Wrap Capacity (teeth): 45 Rear Der/Shifter Compatibility: Shimano Mountain Cage Length: Long Drivetrain Speeds: 7 , 8 Weight: 294