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.