SRAM RED 1 AXS D1 Crankset - DUBTop-level tech The legend of SRAM RED continues, with this SRAM Red D1 Crankset, the lightest, stiffest, highest-performance crankset SRAM has ever made. This advanced crankset is 29 grams lighter than the previous RED crankset. This is thanks in part to the Exogram design, using Hollow Carbon Construction, from the crank arm through to the crank spider to reduce weight without reducing stiffness. The X-Range gearing technology gives riders a more optimal gear range, with smoother gear progression-while the 1x X-SYNC chainring design makes sure no matter what gear you're in, it's smooth and precise with exceptional chain retention. Features Exogram Hollow Carbon Construction from the spider through the crankarms, for an incredible weight-to-stiffness ratio29 grams lighter than the previous SRAM RED cranks X-SYNC chainringfor improved chain and chainring wear, increased chain retention, and a smoother feel SRAM DUB(TM) Road bottom bracket compatibility for use with one of the most advanced-and universally compatible-BB standards on the market SPECIFICATIONSCompatible Bottom Brackets All SRAM Road DUB(TM) BBs, GXP/PF GXP 68mm Crank Arm Material Exogram Hollow Carbon Bottom Bracket Included No Weight N/AIntended Use Road, Gravel | Sram | Red 1 Axs Crankset - Dub 175Mm, 40T | Aluminum