Deore RD-M5100-SGS Rear Derailleur - 11-Speed, Long Cage, Black

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