Sram: You want your bike to do everything, so you need gears that can do everything. 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.FEATURESCompatible 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 force SPECIFICATIONSSpeed (RD): 12sCable pull ratio: X-actuationCage (RD): n/aMax tooth: 44Color (RD): BlackPulley bearings material: SteelCage material (RD): Aluminum