SRAM Quarq Power Meter DZero XX1 Eagle DUB AXS Spider The QUARQ power measurement system specialists have made their DZero and DFour power meters fit for the universal SRAM DUB crank standard. Their light aluminum crankshafts with a diameter of 28.99 millimeters are compatible with the corresponding DUB bottom bracket for all common racing bike bottom bracket standards. The latest generation of Quarq power meters can therefore be easily switched between several bikes. Got questions? Ask me first here or 858-25.1-7.8-87 Everything pictured is included, nothing else is included. If you have any questions don't hesitate to ask. See detailed close-up pictures and read description for more. Send me your offer! Fast and insured shipping 3-5 business days. All money earned will go towards Ukrainian charity funds.