The Shimano RD-M5100 Rear Derailleur provides efficient and smooth shifting for Deore M5100 11-speed drivetrains. Features the Shadow RD chain stabilizer system to minimize chain slap Compatible with a 51T maximum cog size for 11-speed systems Item Specifications Cage Length Long Color Black Drivetrain Speeds 11 Largest Cog 51 Rear Der/Shifter Compatibility Shimano DynaSys11 Rear Derailleur Mount Type 10x1 Standard Shimano Deore M5100 Rear Derailleur Rear Derailleur UPC: 192790618708
