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QuarqDzero DUB XX1 Power Meter Spider


Item # QRQ802K

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  • Black, 142mm, Non-Boost ($611.00)
  • Black, 148mm, Boost ($611.00)
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Item # QRQ802K

Dzero DUB XX1 Power Meter Spider

Quarq's DZero platform has proven to be one of the most accurate and reliable power meters on the market, with its ability to measure right and left side power within +/- 1.5% accuracy. Recently, Quarq decided to upgrade the power meter chassis by integrating SRAM's DUB technology into the crank arms. The result is a stronger, stiffer, and lighter crankset that more efficiently transfers the effort from your legs into forward momentum on your mountain bike. To take advantage of the complete setup, you need this Dzero DUB XX1 Power Meter Spider, as well as a set of the new DZero DUB XX1 crank arms. Once you have these two components, all you need is a SRAM X-Sync 2 chainring and you're ready to hit the trails.

Along with these hardware changes comes a new firmware that employs MagicZero auto-calibration technology. With MagicZero, the system automatically calibrates itself as you ride. You no longer need to backpedal to zero the power meter, and you no longer need to manually calibrate your head unit either. We see this as a welcome relief, as it simplifies the power meter's operation, allowing riders to shift more of their focus to riding and training. Additionally, all power meter related functions have been shifted to the SRAM AXS app. Not only does this give you full control of all AXS components on your bike, but it allows you to set the power meter's zero offset, check battery levels, run diagnostics, and perform firmware updates. The previous software used for this function, Qalvin BLE, has been discontinued.

The DZero DUB Power Meter Spider uses a 4-bolt chainring pattern that pairs with SRAM X-Sync 2 chainrings. It's designed to fit 11- and 12-speed SRAM mountain bike drivetrains. And like we mentioned above, it must be paired with the Quarq DZero DUB crank arm assembly. The assembly is sold separately, and comes with a set of carbon cranks arms in multiple length options, as well as the SRAM DUB spindle. You will also need to purchase a DUB bottom bracket that fits the bottom bracket shell of your frame, if you don't already have one. They are available in multiple standards to fit vitually any modern bicycle frame.

  • The most reliable and accurate MTB power meter to date
  • Pairs with the Quarq DZero DUB XX1 crank arm assembly
  • DUB technology results in a stronger, stiffer, and lighter crankset
  • MagicZero technology automatically calibrates the meter as you ride
  • SRAM AXS app allows full system integration and greater ease of use
  • Individually measures right and left side power with +/- 1.5% accuracy
  • 10K compensation eliminates temperature effects on power data
  • IPX7 waterproof rating, 2-year warranty, and free firmware updates mean this power meter is built to last

Tech Specs
Powermeter Typespider
CompatibilityQuarq XX1 Eagle DUB AXS Crank Arms, SRAM X-Sync 2 104mm BCD chainrings, SRAM DUB bottom brackets
FeaturesMagicZero, 10K TempComp, OmniCal, Bluetooth, ANT+
Accuracy (+/-)1.5%
Operating Time200hrs
Manufacturer Warranty2 years


DZero Power Meter Spiders
 Quarq PrimeElsa RS
August, 2014
Riken R
July, 2015
Rike AL
April, 2015
January, 2016
August, 2014
SRAM 10- or
Most 10- or
Mountain with
104 BCD
Shimano 11-Speed
(hidden bolt)




(non-hidden bolt)





    yes yes    


XX1 Eagle           yes     yes  
XX1 Eagle Boost           yes (168 Q-factor only)     yes  

What do you think about this product?


>Rating: 5

Works great

There's not much to say about it. It works great, and I haven't had any issues with it after ~150 hours on it. I ended up having to order different chain ring bolts than on my stock bike through my LBS to attach these to new chainrings. No big deal, just a heads up - wasn't super straightforward to figure out which bolts.


I have SRAM X01 cranks. Do you also need to buy new cranks with this?


Currently running SRAM XX1 AXS full groupset. Do I need to change cranks?