Designed especially for Shimano®s Dura-Ace® R9100 series, the Quarq DFour91 Power Meter brings Quarqs next-generation DZero platform to Shimanos 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. If you already have a power meter using the 8-bolt interface, upgrade with the DFour91 spider.
Features & Benefits
- 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.
- Only 8-bolt power meter owners can upgrade using the DFour91 Power Meter Spider.
