The Shimano RD-M6100 Rear Derailleur provides efficient and smooth shifting for Deore M6100 12-speed drivetrains. Features the Shadow RD chain stabilizer system to minimize chain slap Fast and precise shifting 13T pulley For single front chainring setup 51T max cog size Item Specifications Cage Length Long Color Black Drivetrain Speeds 12 Largest Cog 51 Rear Der/Shifter Compatibility Shimano Mountain Rear Derailleur Mount Type 10x1 Standard Shimano Deore M6100 Rear Derailleur Rear Derailleur UPC: 192790618692
