SRAM's Eagle 12-speed drivetrains took all the benefits of a single-ring drivetrain and brought it up a notch. Better chain retention, quieter operation, lower maintenance, and simplified shifting make perfect sense for mountain bikes, and with the addition of the 12th cog the gear range is now comparable to 2x systems. NX Eagle is the newest addition to the Eagle lineup and smashes the barrier to entry with the lowest price yet for an Eagle setup. The NX Eagle DUB Groupset includes everything you need to upgrade your bike with 1x12 goodness, except for a bottom bracket.