Quarq DFour91 Power Meter Chassis

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. Compatible with Ultegra® R8000 chainrings – aesthetically it will not match.

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 or Ultegra® R8000 chainrings. Get the chassis, which includes Quarq’s lightweight, sturdy Exogram^TM 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. Compatible with Ultegra® R8000 and 105® R7000 chainrings.
• Must be paired with a compatible SRAM bottom bracket.
• 8-bolt power meter owners can upgrade using the DFour⁹¹ Power Meter Spider.
• BB30 versions ship with the spacers and wave washer required for BB386EVO installation.

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.