This new SX Eagle derailleur is your entry point to the SRAM Eagle Ecosystem. Sharing 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 cassettes. The SX Eagle is cross compatible with much of the Eagle Ecosystem, making it easy to personalize and upgrading your ride when you are ready.Features:A full featured Eagle derailleur, compatible with the Eagle Coloursystem.,X-SYNC™ pulley technology provides greater efficiency, crisper shifting, and quieter operation.,Cage Lock offers discovery-level riders easy wheel removal..Specifications:Speed (RD): 12s,Cable pull ratio: X-actuation,Cage (RD): Long,Max tooth: 50,Colour (RD): Black,Pulley bearings material: Steel,Cage material (RD): Steel.