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 *IPX7 waterproof rating Гарантія 2 міс