SRAM Apex D1 Crankset Speed: 12 Spindle: 28.99mm BCD: Direct Mount 42 DUB 175mm Black Cannondale AISingle ring drivetrain simplifies functionality and reduces weight Wide chainline crankset to fit the biggest gravel tires Longer DUB crank spindle accommodates both Road and MTB width frame bottom bracket standards for unmatched cross compatibility across brands Compatible with 135mm, 142mm, and Boost rear spacing X SYNC wide tooth, narrow tooth chainring technology provides maximum chain control DUB bottom bracket adds durability and simplicity SRAM