The Quarq DFour power meter spider brings precise power measurement to SRAM DUB cranksets at a price point that makes training with data genuinely accessible. This spider-only version fits your existing DUB crank arms and 110 BCD chainrings, so you upgrade to power without overhauling your drivetrain.

  • ±1.5% measurement accuracy across the full pedal stroke
  • DUB spindle interface — pairs with any SRAM DUB crankset
  • 110 BCD chainring compatibility for compact and mid-compact setups
  • ANT+ and Bluetooth Smart dual transmission for broad device compatibility
  • OmniCal auto-zeroing keeps calibration accurate through temperature changes

The DFour spider uses strain gauges embedded in the spider body to capture bilateral power output with consistent accuracy. Battery life is strong with the standard CR2032 coin cell, and replacement takes seconds without tools. The platform integrates seamlessly with Garmin, Wahoo, and all major training apps.

Requires SRAM DUB crank arms (sold separately) and a 110 BCD chainring. Bottom bracket not included.

SRAM warrants Quarq power meters for 2 years against manufacturing defects. Warranty claims for this product should be directed to Tune Cycles. Return the item to us with proof of purchase and we will manage the warranty process with the brand on your behalf.
  • Accurate power measurement with ±1.5% accuracy for data-driven training and racing
  • DUB spindle interface fits SRAM DUB bottom bracket systems
  • 110 BCD chainring interface compatible with compact road and gravel chainrings
  • Dual ANT+ and Bluetooth Smart lets you connect to any head unit, phone or app
  • Auto-zero calibration maintains accuracy throughout the ride
  • Spider-only design means you keep your crank arms and choose your own chainrings
SpecificationValue
Spindle interfaceSRAM DUB
BCD110 mm
Measurement accuracy±1.5%
CommunicationANT+, Bluetooth Smart
BatteryCR2032 coin cell
IncludesSpider only (crank arms and chainrings not included)
SKU PSI-QU003018268002
Model # 003.018.268.002
Barcode # 710845839443
Brand Quarq

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