Used on SC Hightower until mullet conversion for the better part of one year then swapped out for a shorter set. These are still in excellent working condition with cosmetic scuffs. (No chainring but does include bottom bracket.) 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.