Quarq DFour Power Meter Spider

Designed for Shimano®’s lightweight, ergonomic Dura-Ace® groupset, DFour is Quarq’s 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.

8-Bolt Compatibility

Power meters and cranksets on 8-bolt since release:

• Quarq ELSA RS (Aug ’14)
• Quarq RIKEN AL (Apr ’15)
• Quarq Prime Power Ready Cranksets (Mar ’16)
• SRAM RED Power Ready Cranksets (Mar ’16)
• SRAM XX1 Power Meter (Aug ’14) (Note: Boost spiders should not be paired with 156Q crank arms)
• SRAM RED BB386EVO standard crankset (Mar ’16)

Power meters switched to 8-bolt:

• Quarq RIKEN R (Revision AEQ onward, except warranty/replacement – Jul ’15)
• SRAM RED (eTap graphics – Jan ‘16)

Incompatible products:

• Quarq ELSA R

ORDER INFORMATION:

If the information you provide results in an incorrect order that must be returned you will be responsible for the $50 restocking fee. If you are unsure about any information required, contact us.