Quarq DFour Power Meter Crank Arm

Reach new goals and explore new roads with a power meter that delivers on accuracy, durability, and reliability. The Quarq DFour DUB Power Meter is paired with the Quarq DUB Crankarms to pair with your Dura-Ace R9100 or Ultegra R8000 chainrings. A SRAM DUB Bottom Bracket will be required for installation.

Technology

DUB

The relationship between bottom bracket spindle and bearing is the core of DUB technology. It’s where stiffness meets durability. We took it a step beyond conventional thinking and made everything simpler—better integrating the relationship between chainring, crank, spindle and bottom bracket. It’s this approach to developing a complete system that equals better drivetrain performance.

DZero

Quarq’s next-generation DZero power meter platform is named for the D0 Experiment, one of science’s most accurate and innovative projects to detect subatomic particles moving at the speed of light.

Features

• Bluetooth low energy technology and ANT+ wireless data transfer
• MagicZero – automatically checks and recalibrates your power meter as you ride – no need to manually calibrate
• AxCad – no cadence magnet required
• 10K Temperature CompensationBattery – CR2032, 200-hour battery life, change without tools
• OmniCal – swap chainrings without affecting accuracy
• 2-year warranty
• IPX7 waterproof rating
• Accuracy – within 1.5%, measuring both legs.

Specification

• Crank Arm Length: 170mm
• Bottom Bracket Compatilbility: All SRAM Road DUB Bottom Brackets
• Bolt Circle Diameter: 110 BCD
• Bottom Bracket Spindle Interface: DUB
• Crank Arm Material: Carbon