SPIDER SRAM POWERMETER 130bcd DUB AXS BLACKSpider must be paired with a compatible Quarq DZero DUB crankset with an 8 bolt interface and SRAM DUB bottom bracket DZero DUB is designed for the most major brands of 10 and 11 speed chainrings 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