Pairing the durable and smooth DUB bottom bracket platform with hollow carbon Exogram arms, the Quarq DUB crankarm assembly is light, strong and elegant. Simplified part choices, quality materials and a broader compatibility for bottom brackets and chainrings, brings power on every ride.Features-Only compatible with Quarq DZero DUB and DFour DUB power meter spiders-Requires a DUB bottom bracket (sold separately)-Not compatible with 's 3-bolt direct mount interface-Spider and chainrings sold separatelyItem Specifications-BB Included:No-Chainring BCD:Direct Mount-Color:Natural Carbon-Crank Intended Use:Road-Crank Length (mm):167.5-Defined Color:Carbon-Number of Chainrings:No Rings, No Spider Included-Pedal Spindle:9/16"-Spindle Interface Type: DUB