True competitors are always on the lookout for every competitive advantage – a constant pursuit of even lighter, stiffer, stronger, or more stable equipment. To construct the best possible drive system, we scrutinized and refined every detail of the crankset. The latest XX1 Eagle Carbon Tuned crankset is our lightest, stiffest, and most robust crank yet. DUB technology optimizes and simplifies the interaction between the crank axle and bottom bracket, thereby enhancing durability. Our DUB cranksets are simpler, more versatile, and longer-lasting.