GX derailleurs share the key features of higher-priced models and are available for 1x11 and 2x11 drive trains. FEATURES: For 1x11 speed drivetrains Type 2.1 roller bearing clutch in the pulley cage pivot for better chain control X-HORIZON design reduces shift force, ghost shifting and cage slap Cage Lock mechanism for easy wheel changes Sealed cartridge bearings Aluminum cage and steel pulleys SPECS: Color: Black/ Red Largest Cog: 42t Rear Derailleur Mount Type: 10x1 Standard Chain Wrap Capacity (teeth): 32 Cage Length: Long Rear Der/Shifter Compatibility: SRAM X-Actuation Drivetrain Speeds: 11 Weight: 265g