The Descendant 6K DUB crankset delivers consistent performance every time out. Now featuring SRAM's DUB technology, this design simplifies the relationship of the spindle to the bottom bracket. Optimized 6000 series forged aluminum arms support the X-SYNC 2 chainring to provide complete chain control. Now everyone can benefit from a new measure of durability. Features: SRAM DUB technology creates a lighter, stiffer and stronger crankset Optimized 6000 series forged aluminum arms Included direct mount X-SYNC 2 chainring provides significantly quieter performance, with better mud clearing and durability Chainring is designed specifically for Eagle chains and drivetrains DUB compatible bottom bracket sold separately Boost Compatible Specs: BB IncludedNo Chainring BCDDirect Mount SRAM ColorBlack Defined ColorBlack Crank Intended UseMountain Number of ChainringsSingle Rings32 Spindle Interface TypeSRAM DUB Chainline/Hub Compatibility141/148 Boost Hubs