SRAM's NX group puts it all out there on the table as a no nonsense, affordable groupset that borrows technology from SRAM's higher end offerings to bring quality mechanicals to those of us on a budget. The SRAM GX group brings 11 speed drivetrains to the huddled masses with much of the technology from its higher end offerings. The NX 1x11 Rear Derailleur is compatible with all of SRAM's one by drivetrains for precise shifting.The NX 1x11 Rear Derailleur packs in SRAM's top one by engineering to ensure rear shifts are smooth, accurate, and predictable. Starting with the offset pulleys, the tall square toothed X Sync profiles work to positively engage and manage the chain better than traditional pulleys. These pulleys work in conjunction with the X HORIZON's straight parallelogram design, which limits all movement to the horizontal axis, thus eliminating ghost shifting and reducing shifting force. SRAM's proven Roller Bearing Clutch is also present, which delivers maximum drivetrain stability by maintaining consistent tension on the chain even while riding in the most demanding conditions. SRAM's handy Cage Lock design caps things off and keeps the derailleur locked out of the way when needed for easy rear wheel installationremoval.