DZero XX1 Eagle DUB SpiderQuarq Dzero XX1 Boost power meter spider must be paired with a XX1 Eagle DUB 8-bolt crankset and a 104 BCD X-SYNC 2 chainringNot compatible with SRAM's 3-bolt direct mount interfaceBluetooth low energy technology and ANT+ wireless data transferMagicZero technology automatically checks and recalibrates your power meter as you ride no need to manually calibrateAxCad system provides no-magnet cadence dataOmniCal system allows you to swap chainrings without affecting accuracyUse the AXS app to easily update firmware and view power meter metricsUses a CR2032 battery that can be replaced without toolsMeasures power for both legs with +/- 1.5% accuracyIPX7 waterproof ratingItem SpecificationsChainring BCD104 Quarq DZero XX1 Eagle DUB Crank Spider UPC: 710845839450