Use the Quarq DFour Power Meter Spider to upgrade a Quarq ELSA RS Power Meter to the DZero platform.

Designed for Shimano®s lightweight, ergonomic Dura-Ace® groupset, DFour is Quarqs most advanced Shimano®-compatible power meter ever. DFour 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.

The DFour power meter spider works with Shimano®s 11-speed Dura-Ace® 9000, Ultegra® 6800 and 105® 5800 chainrings.

Features & Benefits

Bluetooth low energy technology and ANT+ wireless data transfer.
AxCad no magnet.
10K Temperature Compensation.
Battery CR2032, 200-hour battery life, change without tools.
Power Balance.
OmniCal swap chainrings without affecting accuracy.
2-year warranty.
IPX7 waterproof rating.
Accuracy within 1.5%, measuring both legs.
Free firmware upgrades with the Qalvin app.

Essential Details

Designed for Dura-Ace® 9000 chainrings. Compatible with Ultegra® 6800 and 105® 5800 chainrings.
Uses the 8-Bolt crank to spider interface.
Quarq ELSA RS Power Meter owners can upgrade to the DZero platform with a DFour Power Meter Spider.
Additional clearance to fit BB386EVO bottom brackets.