The XX1 Eagle crankset features a special hollow internal architecture, combined with SRAM's Carbon Tuned technology to provide extreme stiffness and light weight. An X-SYNC 2 chainring offers significantly quieter performance, with better mud clearing and extraordinary durability. As a part of the SRAM Eagle ecosystem, this crankset was developed for a superior 1x drivetrain experience. -SRAM DUB SL technology creates a lighter, stiffer and stronger crankset -Carbon-tuned lay-up crank design provides extreme stiffness and light weight -Included direct mount X-SYNC 2 chainring provides significantly quieter performance, with better mud clearing and durability -Chainring is designed specifically for Eagle chains and drivetrains -DUB compatible bottom bracket sold separately -Boost Compatible