• 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
  
• SRAM Model ID: PM-D4-SPDR-D1

Attributes