SRAM Quarq DFour91 crankset/powermeter 110mm

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  • Quarq DFour91 Quarq DFour91

    Make the most of your Shimano Dura-Ace R9100 groupset by upgrading to Quarq’s DFour91 power meter, which embodies all the advances of the next-generation DZero platform.

    See the difference between DFour91 and DFour.


    Designed especially for Shimano’s Dura-Ace R9100 series, the Quarq DFour91 Power Meter brings Quarq’s next-generation DZero platform to Shimano’s latest groupset.

    DFour91 embodies 10 years of Quarq advances in power meter technology, plus new features such as dual Bluetooth Low Energy and ANT+ wireless data transfer, revised circuitry, a new strain gauge design and the Qalvin BLE app.

    The DFour91 power meter is a bolt-on upgrade, pairing with the 11-speed Dura-Ace R9100 chainrings. Get the chassis, which includes Quarq’s lightweight, sturdy ExogramTM carbon crank arms. The GXP and BB30 versions work with every bottom bracket shell, including BBright and BB386EVO. If you already have a power meter using the 8-bolt interface, upgrade with the DFour91 spider.

    Features & Benefits

    • Exogram carbon crank arms.
    • Bluetooth low energy technology and ANT+ wireless data transfer.
    • AxCad – no cadence magnet required.
    • 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 R9100 chainrings.
    • Must be paired with a compatible SRAM bottom bracket.
    • BB30 versions ship with the spacers and wave washer required for BB386EVO installation.
    • 8-bolt power meter owners can upgrade using the DFour91 Power Meter Spider.


    • Bolt Circle Diameter: Shimano 4-Arm
    • Compatibility: Designed for Dura-Ace R9100 chainrings.
    • Material: CNC Machined Aluminum Spider, Exogram Carbon Crank Arms
    • Accuracy: 1.5%
    • Bottom Bracket: GXP, Press Fit GXP, BB30, Press Fit 30, BBright, BB386EVO, BB30A, PF30A
    • Q Factor: 145mm
    • Wireless Technology: ANT+, Bluetooth low energy technology
    • Battery: CR2032, 200 hours of riding time
    • Discipline: Road, Triathlon, CX, Adventure
    • Weight: ca. 594g

    Why not save some watts?

    More Information and Manuals

    Bottom Bracket Standards

  • Matching chainrings for DZero, DFour, DFour91, Red DZero:
    110mm 50T. 52T.
    110mm 36T. 34T.
    130mm 53T.
    130mm 39T.
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