The Sram XX1 Eagle X-Sync DUB Crankset is made for those competitors who 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. 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. Sram XX1 Eagle X-Sync DUB Crankset Features Eagle™ represents our newest 1x drivetrain technologies  Eagle™ is a lighter, tougher, quieter, more durable and more precise drivetrains  Eagle™ features all-new 1x components, engineered for even greater durability and performance  Eagle™ has a significant weight advantage over other drivetrains  Eagle™ technology allows an expanded, optimum, 500-percent gear range — a 20-percent increase over our other 1x DUB™ technology delivers the lightest, stiffest, strongest crankset available  All-new SRAM CARBON TUNED™ crank technology provides extreme stiffness and light weight  All-new chainring technology is designed specifically for Eagle™ chains and drivetrains  The X-SYNC 2™ chainring provides significantly quieter performance, with better mud clearing and extraordinary durability