SRAM XX1 Eagle 12-Speed GXP Direct Mount Crankset - Boost Black, 175mm/32t Sram Carbon Tuned Crank Technology Provides Extremestiffness And Light Weight All-New Chainring Technology Is Designed Specifically For Eaglechains And Drivetrains The X-Sync 2 Chainring Provides Significantly Quieter Performance, With Better Mud Clearing And Extr