Quarq DFour91 Power Meter Chassis

$1,179.00

Make the most of your Shimano® Dura-Ace® R9100 groupset by upgrading to Quarq’s DFour91 power meter, which embodies all the advances of the next-generation DZero platform.

See the difference between DFour91 and DFour.

The Quarq DFour91 Chassis is available from the Quarq website for customers in the U.S.A. and Canada, from bicycle dealers throughout the world, and from the online retailers shown below.

Clear

Description

Designed especially for Shimano®’s Dura-Ace® R9100 series, 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. Get the chassis, which includes Quarq’s lightweight, sturdy ExogramTM carbon crank arms. The GXP and BB30 versions work with every bottom bracket shell, including BBright and BB386EVO. If you already have a power meter using the 8-bolt interface, upgrade with the DFour91 spider.

$1179 / €1029 / £872

Features & Benefits

  • Exogram carbon crank arms.
  • 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.
  • Must be paired with a compatible SRAM bottom bracket.
  • BB30 versions ship with the spacers and wave washer required for BB386EVO installation.
  • 8-bolt power meter owners can upgrade using the DFour91 Power Meter Spider.

Additional information

Bolt Circle Diameter

Shimano® 4-Arm

Compatibility

Designed for Dura-Ace® R9100 chainrings.

Material

CNC Machined Aluminum Spider, Exogram Carbon Crank Arms

Accuracy

1.5%

Bottom Bracket

GXP, Press Fit GXP, BB30, Press Fit 30, BBright, BB386EVO, BB30A, PF30A

Q Factor

145mm

Wireless Technology

ANT+, Bluetooth low energy technology

Battery

CR2032, 200 hours of riding time

Discipline

Road, Triathlon, CX, Adventure

Weight

594g

Technology

DZero is packed with 10 years of technical innovations and 150 documented technology iterations.

The Heart Of Your Bicycle

The sole job of the crankset is to convert the effort from both legs to forward motion. It is the perfect place to measure power.

Designed To Make You Faster

Quarq’s direct force power meters measure what wins races — total power output from both legs — with 1.5% accuracy.

Built To Last

All power meters have an IPX7 waterproof rating. They feature a 2-year warranty, free firmware updates and acclaimed worldwide support.

For Past, Present & Future

The DZero road power meters work for every discipline. The chainrings are replaceable should your bike, discipline or ability change.

10K Temperature Compensation

Each power meter is programmed with over 10,000 data points to eliminate temperature effects on power measurement.

A Companion Digital Wrench

With Quarq’s free Qalvin app you can set the zero offset, check battery voltage, run diagnostics and perform firmware updates. For free.

DZero Platform

The DZero Platform

Quarq DZero Carbon Chassis
Quarq DZero Power Meter ChassisFor traditional 10- and 11-speed chainrings. Exogram carbon or forged aluminum crank arms. Hidden or non-hidden bolt spider. 130 BCD and 110 BCD. Learn more about DZero Carbon and DZero Aluminum.
Quarq DFour Chassis
Quarq DFour91 and DFour Power Meter ChassisA DZero power meter for Shimano® 11-speed drivetrains, compatible with Shimano’s 4-arm chainrings (1). Learn more about DFour91 and DFour.
SRAM RED DZero Chassis
SRAM RED DZero Power Meter ChassisCreated to work hand-in-hand with SRAM RED eTap. Exogram carbon crank arms. Hidden bolt spider. 130 BCD and 110 BCD. Learn more.
SRAM XX1 Eagle Chassis
SRAM XX1 Eagle Power MeterFor 1X MTB drivetrains. CARBON TUNED™ crank arms, DZero technology. 170 or 175mm. Conventional and Boost variants. Learn more.

Quarq DZero Power Meter SpidersDZero in spider form. Learn more about the DZero, DZero for Specialized, DFour, DFour91 and SRAM XX1 Eagle power meter spiders.
X-SYNC 2 Chainrings
X-SYNC 2 ChainringsFor the SRAM XX1 Eagle Power Meter and compatible with the previous SRAM XX1 Quarq power meter.  32-38T.  X-SYNC 2™ tooth design. Learn more.

 

User Manuals

Find all Quarq Power Meter user manuals in the Support Pages

For further assistance, please Contact Us