Introducing the Apex XPLR 12-Speed Rear Derailleur from SRAM, bringing 12-speed gearing and impeccable shifting to the Apex range. The Apex XPLR derailleur hits the sweet spot of smooth jumps over a big gear range, all with unmatched chain security and the simplicity of a 1x drivetrain. Quietly and quickly shift across our 12-speed cassettes with 44T large cogs, knowing you ll have the gears you need.Compatible with cassettes with 44T large cogsUse with Flattop chainWorks with 12-speed mechanical Apex and Eagle shiftersClutch controls chain tension for consistent shiftingX-HORIZON straight parallelogram design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift forceSpecification: Speed (RD): 12sCable pull ratio: X-actuationCage (RD): n/aMax tooth: 44Colour (RD): BlackPulley bearings material: SteelCage material (RD): Aluminium