xx1 eagle™ dub™ sl cranksettrue competitors are always looking for a performance advantage — a relentless pursuit of equipment that is lighter, stiffer, stronger and more durable. to create ,the best drivetrain possible, we re-examined and re-engineered our crankset design. our all-new xx1 eagle™ carbon tuned™ crankset is our lightest, stiffest and strongest to date. sram dub™ technology enhances this by simplifying the relationship of the spindle to the bottom bracket, and redefining the measure of durability. dub™-powered cranksets mean simplicity, compatibility and durability.dub™ technology delivers the lightest, stiffest, strongest crankset availableall-new sram carbon tuned™ crank technology provides extreme stiffness and light weightthe x-sync™2 chainring provides significantly quieter performance, with better mud clearing and extraordinary durability