Quarq Dub DFOUR Dura Ace R9100 Power Meter

Quarq Dub DFOUR Dura Ace R9100 Power Meter
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Favero Assioma DUO

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With this Quarq Dub DFOUR Dura Ace R9100 bundle, you get a strong, lightweight and high performance double-sided power meter. This bundle consists of Quarq crank arms with Dub fitting, the Quarq Dfour power meter spider and possibly Dura-Ace sprockets.

More than ten years of experience
The power meter incorporates ten years of experience that Quarq has with power meters. This means that the chance of malfunctions is further reduced and the power meter gives strong, stable and reliable values. For example, this power meter has Quarq MagicZero technology, with which the power meter calibrates during cycling. It also automatically adjusts itself to changing temperatures, so you always have reliable data. As a result, the power meter has a deviation of only 1.5%.
The power meter is also weatherproof and has a waterproof rating of IPX7.

Compatible with Shimano Chain Rings
The Dura-Ace R9100 sprockets fit best on this power meter. However, you can also place the Ultegra R8000 and 105 R7000 sprockets on it without affecting the measurement results.

Rigid and light crank arms
The power meter is a spider to be placed on Quarq Dub crank arms. These carbon crank arms have a low weight and a high stiffness. To mount these crank arms you need a Sram Dub bottom bracket.


• Spider weight: 275 grams
• Weight of crank arms: 825 grams
• Weight Dura-Ace R9100 outer chainring: about 110 grams
• Weight of Dura-Ace R9100 inner chainring: about 33 grams
• Total weight incl. chainrings: about 1245 grams

Delivery includes

• Quarq DFOUR Power meter spider
• Quarq DUB crank arms
• Possibly Dura-Ace chainrings + ring bolts

Note: SRAM DUB bottom bracket needed
This power meter requires a bottom bracket with a SRAM DUB fitting. A suitable bottom bracket can be found here.
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5.0 / 5
Average from 5 reviews
5 reviews
0 reviews
0 reviews
0 reviews
0 reviews

Most relevant reviews

5 / 5

Exceptional quality / price ratio

- Denis 13 October 2021

I am very satisfied with the purchase, the quarq dfour power meter is very easy to install, accurate in measuring and also easy to set up. It is also possible to update the firmware with using the sram mobile app It is very difficult to find something so efficient at an equally cheap price, at this figure it is a best buy. Recommended do not miss it !!!

Pros & Cons

accurate power measurement
easy to set up
Aesthetically worse than the original dura ace cra

5 / 5

Gute Qualität zum kleinen Preis

- Dennis 26 September 2021

Bin super zufrieden mit der Quark Kurbel-sehr genau und leicht zu montieren! Klare Kaufempfhelung

Pros & Cons

Einfach zu montieren
Qualität sehr gut
Sehr genau

5 / 5

Werkt uitstekend

- Jules 18 September 2020

Qua prijs kwaliteit top

Pros & Cons

Dubbel powermeter
In alle weer omstandigheden
Werkt goed
Dub aanpassingsstuk nodig

5 / 5

Potenciómetro espectacular

- Antonio 29 May 2020

El producto llego antes de lo previsto incluso con el tema del covid 19

Pros & Cons


5 / 5

Ottimo servizio

- Francesco 16 April 2020

Prodotti corrispondenti alla descrizione, spedizione rapidissima

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Quarq Dub DFOUR Dura Ace R9100 Favero Assioma DUO Quarq Sram AXS D1 Favero Assioma UNO
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5 reviews 234 reviews 16 reviews 94 reviews
Number of gears 12 speed / 11 speed
Crank Length 170 mm / 172.5 mm / 175 mm
Shimano Crankset Dura Ace R9100
Application Road / Cyclocross / Gravel Road Road / Cyclocross / Gravel Road
Single-/dual sided Dual-sided Dual-sided Dual-sided Single-sided
Measuring Position Crank Pedal Spider Pedal
From 2546,40 3062,60 1790,50 1905,40
This product View product View product View product

All specifications


Number of gears
12 speed / 11 speed
Shimano Crankset
Dura Ace R9100
Road / Cyclocross / Gravel
Single-/dual sided
Measuring Position
Power Source
Compatible with
Crankset axle fit
SRAM Dub (29mm)
Chainring Type
110 mm
ANT+ / Bluetooth

Additional information

• MagicZero™: Automatic calibration while cycling
• Bluetooth low energy technology and ANT+ wireless connection
• AxCad: cadence measurement without magnet
• 10K Temperature Compensation.
• CR2032 Battery that lasts 200 hours
• Power Balance.
• OmniCal: change your chainrings without affecting reliability
• 2 year warranty
• IPX7 waterproof rating.
• Maximum deviation of only 1.5%
• Free Firmware Upgrades with the Sram AXS App