Power Meters

Quarq DFour Power Meter Chassis


The DFour power meter is a bolt-on upgrade for Shimano’s 11-speed Dura-Ace 9000, Ultegra 6800 and 105 5800 drivetrains.

$1179 / €1029 / £968

***Order Shipment Delay***
We are currently experiencing high order volume on our new platform power meters. Because of this, new orders will ship during the week of January 30, 2017. We apologize for any inconvenience this causes and appreciate your support of our products and your patience.

Purchase Options

Locate a Dealer

  1. Select model:

    *bottom bracket not included

  2. Add a Bottom Bracket (Optional)

    Please verify your bike's bottom bracket type before ordering.

  3. Add chainrings (Optional)

    View our product compatibility page for help selecting the best chainring option.

  4. Add a Head Unit (Optional)

    Must be purchased with a power meter. Heart Rate Strap is not included.

  5. Add a QuickView Computer Mount (Optional)

  • Total Price:



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.


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 BLE app.
BB30 versions ship with the spacers and wave washer required for BB386EVO installation.

Product Brochures


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