Quarq DFour91 Power Meter Chassis

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 DFour91 is designed for Shimano’s Dura-Ace R9100 chainrings. It uses Quarq’s lightweight, sturdy ExogramTM carbon crank arms. GXP and BB30 versions work with every bottom bracket shell, including BBright and BB386EVO.

- 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 DFour or DFour91 power meter spider
- 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
- 2-year warranty
- IPX7 waterproof rating
- Accuracy — within 1.5%, measuring both legs
- Chainrings and bottom bracket sold separately