SRAM XX1 Eagle AXS Crank Arm Assembly - 175mm, 8-Bolt Direct Mount, DUB Spindle Interface, GrayThe SRAM XX1 Eagle DUB crank arm assembly offers simplicity, compatibility and durability in a Carbon Tuned package. Product Details: 8 bolt crank interface is compatible with Quarq Dzero XX1 Eagle power meter spider DUB technology simplifies the relationship of the spindle to the bottom bracket Not compatible with SRAM's 3 bolt direct mount interface Spider and chainrings sold separately Specifications: BB Included: No Chainring BCD: Direct Mount