SRAM XX1 Eagle AXS Boost Crankset - 170mm, 12-Speed, 34t, Direct Mount, DUB Spindle Interface, GrayThe SRAM XX1 Eagle AXS Crankset is designed using SRAM's DUB interface and Carbon Tuned lay up technology for tough and aggressive XC riding. Product Details: 52mm chainline for Boost spacing Carbon Tuned crank technology provides extreme stiffness and SRAM's lightest weight crankset Chainring technology is designed specifically for SRAM Eagle chains and drivetrains SRAM DUB technology simplifies the relationship of the spindle to the bottom bracket