The SRAM XX1 Eagle AXS Crankset is designed using SRAM's DUB interface and Carbon Tuned lay-up technology for tough and aggressive XC riding. FEATURES : Carbon Tuned crank technology provides extreme stiffness and SRAM's lightest weight crankset SRAM DUB technology simplifies the relationship of the spindle to the bottom bracket for superior compatibility and durability The X-SYNC 2 chainring provides significantly quieter performance, with better mud clearing and extraordinary durability Chainring technology is designed specifically for SRAM Eagle chains and drivetrains 52mm chainline for Boost spacing Designed to pair perfectly with the XX1 Eagle AXS drivetrain components SPECS : Number of Chainrings: Chain Retaining Single Color: Gray Crank Length (mm): 175 Pedal Spindle: 9/16" Crank Intended Use: Mountain Chainline/Hub Compatibility: 141/148 Boost Hubs Rings: 34 Spindle Interface Type: SRAM DUB Drivetrain Speeds: 11 , 12 Defined Color: Gray Chainring BCD: Direct Mount SRAM BB Included: No