SRAM's NX Eagle DUB Groupset brings the improved chain retention, simple shifting, and quiet operation of SRAM's 12-speed Eagle drivetrains to a pricepoint that's easy to swallow without skimping on performance. This kit has all the necessary components to build out your bike with a 1 x 12 drivetrain, with the exception of a SRAM DUB bottom bracket to match your frame. This groupset includes the crankset, cassette, chain, rear derailleur, shifter, and b-gap adjustment tool. The crankset comes with a 32t, 6mm offset chainring for non-Boost bikes with QR or 12 x 142mm rear hub spacing. The crankset works with just about any frame provided you get the correct bottom bracket (sold separately).