SRAM GX EAGLE CARBON 170x32 DM DUB w/oCUPS LUNAR 12s BOOST 148 COMPATIBLEThe latest entry into the GX lineup rounds it out with a top tier carbon crank arm version paired with the classic XSync 2 chainring Compatible with all levels of Eagle drivetrain systems to be used as a complete drivetrain or to mix and match with other Eagle parts Eagle technology provides an expanded, optimum, gear range making you fast on the flats, giving you control on the climbs and unleashing your speed on the descents DUB technology features