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.

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

Specifications

• Speeds: 11
• Crank arm length: 170mm, 172.5mm, 175mm
• BB Compatibility: All SRAM Road DUB BBs
• Chainring Size: n/a
• Bolt Circle Diameter (BCD): 110 BCD
• Chainline: n/a
• BB Spindle Interface: DUB
• Chainring material: n/a
• Guard: No Guard
• Crank arm material: Carbon
• Color (Crank arm): Natural carbon
• Power Meter Type: Spider