This new NX Eagle™ derailleur features the proven SRAM 1x-specific X-HORIZON™ design. The larger, 14-tooth X-SYNC™ lower pulley easily facilitates 11- to 50- and 10- to 50-tooth cassette capacity, and also adds to NX Eagle's overall smooth-pedaling feel. The Type-3 ROLLER BEARING CLUTCH™ provides quiet, consistent performance and durability. Completely new rear derailleur incorporating proven X-HORIZON™ design and new Type-3 ROLLER BEARING CLUTCH™ technology. Eagle™ ecosystem-engineered mounting system and CAGE LOCK™ positioning add robustness. Eagle™ pulley technology provides greater efficiency, crisper shifting and quieter operation. SRAM Model ID: RD-NX-1-B1 Attributes Cage Long Maximum Cog 50T Minimum Cog 10T Primary Color Black RD Capacity 40T Speed 12
