evo.com | SRAM Crank Sets > Affordable and functional, the SRAM / TruVativ Descendant Carbon Eagle Boost 12-Speed Crankset is a direct mount crankset featuring a carbon construction and SRAM's signature DUB technology. Bold Circle Diameter (BCD) Direct Mount BB Compatibility DUB BSA73,DUB PF89.5,DUB PF92,DUB PF30 MTB73,DUB BB30 MTB73, DUB:BSA73, PF89.5, PF92, PF30 MTB73, BB30 MTB73, BSA MTB68SP Aluminum Chainring / Carbon Crank Arm Fully Compatible with Any 1x Drivetrain DUB Technology The relationship between bottom bracket spindle and bearing is the core of DUB technology. It's where stiffness meets durability. SRAM took it a step beyond conventional thinking and made everything simpler-better integrating the relationship between chainring, crank, spindle and bottom bracket. It's this approach to developing a complete system that equals better drivetrain performance. | SRAM / TruVativ Descendant Eagle Boost 12-Speed Crankset 2024 - 170mm, 32T Size 170mm 32T | Aluminum