Bluetooth low energy technology and ANT+ wireless data transfer.
AxCad - no magnet.
10K Temperature Compensation.
Battery - CR2032, 200-hour battery life, change without tools.
OmniCal - swap chainrings without affecting accuracy.
IPX7 waterproof rating.
Accuracy -- within 1.5%, measuring both legs.
Every innovation in Quarq’s next-generation DZero platform is channeled into DFour. It embodies 10 years of Quarq technology advances with new features such as dual Bluetooth low energy and ANT+ wireless data transfer, the new Qalvin BLE app and compatibility with BB386EVO bottom brackets.
Designed for Dura-Ace 9000 chainrings. Compatible with Ultegra 6800 and 105 5800 chainrings.
Must be paired with a compatible SRAM bottom bracket.
ELSA RS power meter owners can upgrade using the DFour Power Meter Spider.
Free firmware upgrades with the Qalvin app.
BB30 versions ship with the spacers and wave washer required for BB386EVO installation.
Material CNC Machined Aluminum Spider, Exogram™ Carbon Crank Arms Accuracy 1.5% Bolt Circle Diameter 110 Asymmetric BCD Arm Lengths 162.5mm, 165mm, 170mm, 172.5mm, 175mm, 177.5mm Q-Factor 145mm Bottom Bracket GXP, Press Fit GXP, BB30, Press Fit 30, BBright, BB386EVO, BB30A, PF30A Wireless Technology ANT+, Bluetooth low energy technology Battery CR2032, 200 hours of riding time Weight 588g Head Unit
ANT+™ and Bluetooth® low energy technology compatible head units (available separately)
Shimano® 11-speed chainrings (except for R9100). Designed for Dura-Ace® 9000. Compatible with Ultegra® 6800 and 105® 5800.
MSRP $1179 / €1029 / £968
- Additional Information
Brand Quarq Battery Type CR2032 Crank Type Exogram Carbon System Type Full-system