QUARQ DFOUR ROAD POWER METER DUB 110 BCD for SHIMANO crank

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.