Check the listing for details. Quarq DZero XX1 Eagle AXS DUB Boost Power Meter Spider - 104 BCD, 8-Bolt Crank. Color: Black, Condition: New. Listed at 570.84 USD. The Quarq DZero XX1 Eagle DUB Power Meter Spider combines advanced power meter technology with SRAMs innovative DUB platform to bring you a simple spider-based power meter.Quarq Dzero XX1 Boost power meter spider must be paired with a XX1 Eagle DUB 8-bolt crankset and a 104 BCD X-SYNC 2 chainring. Simplified part choices, quality materials and a broader compatibility for bottom brackets and chainrings, brings power on every ride. Bluetooth low energy technology and ANT+ wireless data transfer. MagicZero technology automatically checks and recalibrates your power meter as you ride no need to manually calibrate. AxCad system provides no-magnet cadence data. OmniCal system allows you to swap chainrings without affecting accuracy. Use the AXS app to easily update firmware and view power meter SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us