- Combine any length Quarq DUB crank arm with DFour DUB power meter for Shimano® R9100 11-Speed groupset.
- Designed for R9100 chainring. Compatible but not aesthetically pleasing with Shimano’s R8000 chainrings and Shimano's R700 chainrings.
- Magic Zero: Automatically check and recalibrates your power meter to ensure it is always accurate.
- AXS™ app: Easily update firmware and view power meter metrics.
- OmniCal: Swap chainrings without affecting accuracy.
- 10K TEMPERATURE COMPENSATION: Each power meter is programmed with over 10,000 data points to eliminate temperature effects on power measurement.
- For use with Red D1, Force D1, or Quarq D1 crank arms