SRAM XX1 Eagle AXS Crank Arm Assembly - 175mm 8-Bolt Direct Mount DUB Spindle Interface Gray Model=MT5 HC Disc Brake The combi boot is

The combi boot is

For tough waxing conditions or when the weather changes in a flash

Ski Core: Paulownia + Carbon

For the XX1 spider

SRAM XX1 Eagle AXS Crank Arm Assembly - 175mm 8-Bolt Direct Mount DUB Spindle Interface Gray Model=MT5 HC Disc Brake The combi boot isSRAM XX1 Eagle AXS Crank Arm Assembly 175mm 8 Bolt Direct Mount DUB Spindle Interface Gray. The SRAM XX1 Eagle DUB crank arm assembly offers simplicity compatibility and durability in a Carbon Tuned package. DUB technology simplifies the relationship of the spindle to the bottom bracket 8 bolt crank interface is compatible with Quarq Dzero XX1 Eagle power meter spider Not compatible with SRAMs 3 bolt direct mount interface Spider and chainrings sold