SRAM Apex XPLR D1 12-Speed Rear Derailleur

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.