SRAM XX1 Eagle Carbon Boost Crankset - 170mm, 12-Speed, 34t, Direct Mount, DUB Spindle Interface, BlackThe 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 technology creates a lighter, stiffer and stronger