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Quarq DFour91 Power Meter Spider

Quarq DFour91 Power Meter Spider

$779.00

Upgrade a Quarq 8-bolt power meter (see below) or Quarq Prime Power Ready crankset with a DFour91 power meter to make the most of your Shimano® Dura-Ace® R9100 groupset, which embodies all the advances of the next-generation DZero platform.

SKU: QS-DFOURS-1 Category:

Description

Designed especially for Shimano®’s Dura-Ace® R9100 series chain rings, the Quarq DFour91 Power Meter brings Quarq’s next-generation DZero platform to Shimano’s latest groupset. Compatible with Ultegra® R8000 chainrings, although aesthetically it will not match as well as the R9100 chainrings.

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 or Ultegra® R8000 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 magnet.
  • 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. Compatible with Ultegra® R8000  and 105® R7000 chainrings.
  • Only 8-bolt power meter owners can upgrade using the DFour91 Power Meter Spider.

8-Bolt Compatibility

Power meters and cranksets on 8-bolt since release:

  • Quarq ELSA RS (Aug ’14)
  • Quarq RIKEN AL (Apr ’15)
  • Quarq Prime Power Ready Cranksets (Mar ’16)
  • SRAM RED Power Ready Cranksets (Mar ’16)
  • SRAM XX1 Power Meter (Aug ’14) (Note: Boost spiders should not be paired with 156Q crank arms)
  • SRAM RED BB386EVO standard crankset (Mar ’16)

Power meters switched to 8-bolt:

  • Quarq RIKEN R (Revision AEQ onward, except warranty/replacement – Jul ’15)
  • SRAM RED (eTap graphics – Jan ‘16)

Incompatible products:

  • Quarq ELSA R

ORDER INFORMATION:

If the information you provide results in an incorrect order that must be returned you will be responsible for the $50 restocking fee. If you are unsure about any information required, contact us.

Additional information

Weight 0.00 lbs
Dimensions 0.00 × 0.00 × 0.00 in

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OUR STORE HOURS: Monday – Friday. 9am – 5pm Eastern Time. Please use the contact form on our contact page or call us at 540.587.9025 for questions.