Quarq DFour91 Power Meter Spider

$1,249.00

Upgrade a Quarq 8-bolt power meter 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.

Description

The Quarq DFour91 Power Meter Spider is 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.

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 cadence magnet required.
  • 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 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

 

Bolt Circle Diameter Shimano® 4-Arm
Compatibility Designed for Dura-Ace® R9100 chainrings.
Material CNC Machined Aluminum Spider
Accuracy 1.5%
Wireless Technology ANT+, Bluetooth low energy technology
Battery CR2032, 200 hours of riding time
Discipline Road, Triathlon, CX, Adventure
Weight 154g

 

Additional information

Weight 1 kg
Dimensions 20 × 20 × 10 cm
BCD

130 BCD NHB, 110 BCD NHB, 130 BCD HB, 110 BCD HB

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