The Quarq DFour DUB Power Meter Spider is a high-performance road cycling power meter designed for riders who want accurate training data, reliable performance tracking and broad drivetrain compatibility. Built on Quarq’s proven DFour power meter platform and combined with SRAM’s innovative DUB technology, this spider-based power meter delivers precise, dependable power measurement for road cyclists, racers, triathletes and performance-focused riders.
- Spider-only Quarq DFour DUB power meter
- Built on Quarq’s proven DFour power meter platform
- Designed for Shimano Dura-Ace R9100 chainrings
- Compatible with Shimano Ultegra R8000 and 105 R7000 chainrings
- Requires compatible Quarq DZero DUB crankset
- Requires SRAM DUB bottom bracket
- Accurate dual-sided power measurement within +/-1.5%
- MagicZero automatic calibration while riding
- Bluetooth Low Energy and ANT+ wireless data transfer
- AxCad cadence measurement with no magnet required
- 10K Temperature Compensation for consistent accuracy
- Power Balance data support
- OmniCal allows chainring changes without affecting accuracy
- Tool-free CR2032 battery replacement
- Up to 200 hours battery life
- IPX7 waterproof rating
- Free firmware upgrades via the SRAM AXS app
- 2-year warranty
Designed for use with a compatible Quarq DZero DUB crankset and SRAM DUB bottom bracket, the DFour DUB power meter spider is built specifically for Shimano Dura-Ace R9100 chainrings. It is also compatible with Shimano Ultegra R8000 and 105 R7000 chainrings, although the aesthetic match may differ.
With over 10 years of Quarq power meter development behind it, the DFour DUB Power Meter provides accurate dual-sided power measurement within +/-1.5%, helping you train smarter, pace efforts more effectively and monitor performance on every ride. Whether you are completing structured training, racing, climbing or riding long distances, this power meter gives you the data needed to improve.
Quarq’s MagicZero automatic calibration checks and recalibrates as you ride, so there is no need to manually calibrate through your head unit. AxCad cadence measurement removes the need for a cadence magnet, while 10K Temperature Compensation helps maintain accuracy in changing weather conditions.
With Bluetooth Low Energy and ANT+ wireless data transfer, the Quarq DFour DUB connects easily to compatible GPS cycling computers, smart devices and training apps. The tool-free replaceable CR2032 battery offers up to 200 hours of battery life, while IPX7 waterproof protection ensures reliable performance in wet riding conditions.