Quarq: DFour DUB power meter spider must be paired with a compatible Quarq DZero DUB crankset and SRAM DUB™ bottom bracket.

DFour DUB is designed for Dura-Ace R9100 chainrings.

Every innovation in Quarq’s DFour platform represented the 10+ years of Quarq’s advances in power meter technology. This same platform is now combined with SRAM’s innovative DUB technology to bring you the simplest spider-based power meter. Simplified part choices, quality materials and a broader compatibility for bottom brackets and chainrings, brings power on every ride.

Features & Benefits

MagicZero™ – automatic calibration as you ride. No need to back pedal or manually calibrate through your headunit.Bluetooth low energy technology and ANT+ wireless data transfer.

AxCad – no cadence magnet required.10K Temperature Compensation.

Battery – CR2032, 200-hour battery life, change without tools.Power Balance.

OmniCal – swap chainrings without affecting accuracy.2-year warranty.IPX7 waterproof rating.

Accuracy – within 1.5%, measuring both legs.