Truvativ: BORN FROM THE MOUNTAIN The svelte strength of carbon fiber with the swagger of heavy metal. The Descendant carbon crankset uses a proprietary TRUVATIV carbon construction process that delivers a crankset light enough for XC, yet bold and badass enough for Enduro. Style and substance - Descendant. SRAM DUB™ technology features a better-engineered bottom bracket and a new spindle design. Together, these allow for a more uniform approach to bottom bracket fitment, better sealing against contamination and forward and backward compatibility. Now everyone can benefit from a new measure of durability.THINGS TO REMEMBERLess weight with Direct Mount ringMost affordable carbon crankset in the industryFEATURES AND BENEFITSCarbon construction for lightweight durabilitySRAM DUB™ technology features a uniform approach to bottom bracket fitment, better sealing against contamination and is forward and backward compatible.Fully compatible with any 1x drivetrain SPECIFICATIONSSpeeds: 11/12BB Compatibility: DUB:BSA73, PF89.5, PF92, PF30 MTB73, BB30 MTB73, BSA MTB68SPChainring Size: 30Crank arm length: 170mm, 175mmChainline: 55.0mmBB Spindle Interface: DUBChainring material: AluminumGuard: No GuardBolt Circle Diameter (BCD): Direct Mount (DM)Crank arm material: CarbonColor (Crank arm): Black