Sram XX1 Eagle DUB SL Boost crankset with X-Sync 2 34T Direct Mount chainring (3 mm offset, 52 mm chainline). 170-175 arms lenght. Compatible with Boost frames (148 mm), Sram DUB bottom brackets (BSA, BB30, PF30, PF92.) and 11-12s drivetrain. Only 425 gr. weight. UD black/silver carbon finishing. Comes with silicone crank arm boots protectors.