FEATURES:

• 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
• Chainring BCD: 110 Asym