DZero DUB Spider Power meters returned to QBP are subject to a 30% restocking fee, unless product and packaging are unopened, unused, free of damage, and can be sold as new Spider must be paired with a compatible Quarq DZero DUB crankset with an 8-bolt interface and SRAM DUB bottom bracket Not compatible with SRAM's 3-bolt direct mount interface DFour DUB is designed for Dura-Ace R9100 chainrings 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 Use the AXS app to easily update firmware and view power meter metrics Measures power for both legs with +/- 1.5% accuracy Uses a CR2032 battery that can be replaced without tools OmniCal system allows you to swap chainrings without affecting accuracy IPX7 waterproof rating Color: Black Chainring BCD: 110 Asym
