Quarq DFour 91 GXP Carbon Crank Power Meter

Every innovation in Quarq?s next-generation DZero platform is channeled into DFour: 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 new Qalvin BLE app. The DFour chassis pairs with Shimano?s 11-speed Dura-Ace 9000, Ultegra 6800 and 105 5800 chainrings. New DFour91 is designed for Shimano?s Dura-Ace R9100 chainrings. Both use Quarq?s lightweight, sturdy ExogramTM carbon crank arms. GXP and BB30 versions work with every bottom bracket shell, including BBright and BB386EVO. If you already have a power meter with an 8-bolt interface, upgrade using the DFour or DFour91 power meter spider.
- DFour is designed for Dura-Ace 9000 chainrings and compatible with Ultegra 6800 and 105 5800 chainrings.
- DFour91 is designed for Dura-Ace R9100 chainrings.
- Must be paired with a compatible SRAM bottom bracket.
- 8-bolt power meter owners can upgrade using a power meter spider.


Features:

- 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
- OmniCal: swap chainrings without affecting accuracy
- IPX7 waterproof rating
- Accuracy: within 1.5%, measuring both legs.


Specifications:

- Speeds: n/a
- Crank arm length: 162.5mm, 165mm, 170mm, 172.5mm, 175mm, 177.5mm, n/a
- BB Compatibility: BB30/PF30-68mm, GXP/PF GXP 68mm, n/a
- Chainring Size: n/a
- Bolt Circle Diameter (BCD): 110 BCD
- Chainline: 45.0mm
- BB Spindle Interface: 24mm, 30mm, n/a
- Chainring material: n/a
- Guard: No Guard
- Crank arm material: Carbon, n/a
- Power Meter Type: Ant USB

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