Quarq DFour AXS DUB Power Meter Spider - 110 BCD, 8-Bolt Crank Interface, BlackDZero DUB Spider Product Details: AxCad system provides no magnet cadence data Bluetooth low energy technology and ANT+ wireless data transfer DFour DUB is designed for Dura Ace R9100 chainrings IPX7 waterproof rating MagicZero technology automatically checks and recalibrates your power meter as you ride no need to manually calibrate Measures power for both legs with + 1. 5% accuracy Not compatible with SRAM's 3 bolt direct mount interface OmniCal
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Quarq DFour AXS DUB Power Meter Spider - 110 BCD, 8-Bolt Crank Interface, Black