The new SX Eagle derailleur features the proven Sram 1x-specific X-Horizon design and easily facilitates 11-50t and 10-50t cassette capacity The new SX Eagle derailleur features the proven Sram 1x-specific X-Horizon design and easily facilitates 11-50t and 10-50t cassette capacity X-Sync pulley technology provides greater efficiency, crisper shifting and quieter operation Cage Lock offers discovery-level riders easy trail side wheel removal Fully compatible with the entire Eagle lineup