Quarq DZero XX1 Eagle AXS DUB Boost Power Meter Spider - 104 BCD, 8-Bolt Crank Interface, Black. DZero XX1 Eagle DUB Spider. 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. Not compatible with SRAM's 3-bolt direct mount interface. 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 metrics.Uses a CR2032 battery that can be replaced without tools. Measures power for both legs with +/- 1.5% accuracy.