SRAM NX Eagle Crankset - 170mm, 12-Speed, 32t, Direct Mount, DUB Spindle Interface, BlackThe NX Eagle crankset delivers Eagle styling and performance to the newest addition of the Eagle ecosystem. DUB technology features a better engineered bottom bracket and a new spindle design, which together allows for a more uniform approach to bottom bracket fitment, better sealing against contamination and forward and backward compatibility. Direct Mount X Sync 2 Steel Chainring included Bottom bracket sold separately 6000 series forged aluminum