Quarq Dfour91 110 Gxp crankset

Designed especially for Shimanos Dura-Ace R9100 series, the Quarq DFour91 Power Meter brings Quarqs next-generation DZero platform to Shimanos latest groupset. Compatible with Ultegra R8000 chainrings.
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 Quarqs 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.

• 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.
• Designed for Dura-Ace 9100 chainrings. Also compatible with Ultegra R8000 chainrings. See the difference between DFour91 and DFour.
• Must be paired with a compatible SRAM bottom bracket.
• GXP
• 8-bolt power meter owners can upgrade using the DFour91 Power Meter Spider.