Utilising the Shimano Shadow RD+ design, the Shimano Deore M5100 Rear Derailleur delivers consistent MTB shifting performance over rough terrain. The low-profile design avoids damage from rocks whiles Shimano's chain stabilizing technology reduces chain drop and makes for a quiet drivetrain in all gear positions.Deore M5100 Shadow plus 11-speed rear derailleur for dependable shifting performance and durabilityShadow plus features a super low-profile design and optimized slant angle for super light shifting actionShadow Plus uses a chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shiftingSingle tension spring prevents contact with the chain stay resulting in a silent ride13T pulleys and decreased derailleur tension prevent high chain tension in low gearsDirect cable routing prevents snagging from any trail side hazardsWide alloy links and pivot bodyFluorine-coated link pin bushingsStrong return spring for a positive shifting feelDurable 13T bearing pulleys for low frictionTop normal spring uses the spring to select higher gearsMax low sprocket: 51T (1x 11-speed)40T capacity SGS cage