This new SX Eagle derailleur is the entry point to the Sram Eagle EcosystemSharing many features with the rest of the Eagle Ecosystem like the proven Sram 1x-specific X-Horizon body design, it can accommodate both 11-50T and 10-50T cassettesA full featured Eagle derailleur, compatible with the Eagle ColorsystemX-Sync pulley technology provides greater efficiency, crisper shifting, and quieter operationCage Lock offers discovery-level riders easy wheel removalSX Eagle12sp50LongBLKUPC/EAN/GTIN: 710845865206