DFour91 Quarq 11R-110 Road Power meter BB30 175

FEATURES

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.
2-year warranty.
IPX7 waterproof rating.
Accuracy -- within 1.5%, measuring both legs.

OVERVIEW

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 9100 chainrings. Compatible with Ultegra 8000 and 105 7000 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.