The SRAM NX X-HORIZON rear derailleur provides the same smooth, reliable shifting action as XX1-from the larger upper pulley offset to the 12-tooth X-SYNC pulley wheels.By eliminating unwanted chain movement, X-HORIZON shifts faster, puts an end to ghost shifting and reduces shift force and chain slap. And with CAGE LOCK technology, wheel removal and installation are easier than ever.Features:The NX 1x11 X-HORIZON rear derailleur is an integral part of the SRAM 1x drivetrain systemThis rear derailleur was designed specifically for demands of 1x MTB applicationsMost affordable fully featured 1x rear derailleur in the industryThis is the ideal rear derailleur for the $1K bikeSpecifications:Speed (RD): 11sCable pull ratio: X-actuationCage (RD): LongMax tooth: 42Color (RD): BlackPulley bearings material: SteelCage material (RD): SteelWeight (g): 322