The SX Eagle derailleur features the proven SRAM 1x-specific X-HORIZON design and easily facilitates 11-50t and 10-50t cassette capacity, providing quiet, consistent performance and durability FEATURES: SX Eagle derailleur is your entry point to the SRAM Eagle Ecosystem A full featured Eagle derailleur, compatible with the Eagle Colorsystem X-SYNC pulley technology provides greater efficiency, crisper shifting and quieter operation Cage Lock offers discovery-level riders easy trail side wheel removal SPECS: Color: Black Largest Cog: 50 Rear Derailleur Mount Type: 10x1 Standard Chain Wrap Capacity (teeth): 40 Cage Length: Long Rear Der/Shifter Compatibility: SRAM X-Actuation Drivetrain Speeds: 12