This article states “Quarq does not approve the use of Praxis chainrings. They stated that the Praxis rings are “out of our spec”, and change your power reading. It seems curious to me, however, because they can calibrate properly for both a standard Red ring and a Red solid TT ring, which are of a different weight and stiffness. The slope can be set similar to an SRM, so I don’t quite understand the issue – just be aware of this consideration if you wanted to put Praxis chainrings on your Quarq crank.” but it’s ftom over a year ago. Has anyone put Praxis rings on their Quarq and did you have any calibration or consistency issues? I’m interested in going to a 52/36 set from the FSA Super Road 50/34 that I currently have.
I never saw anything about this incompatibility before this. Quarq doesn’t list it on their site either, so maybe it’s been fixed with the Riken/Red/Elsa models?
I’ve been running a 110 Riken with 52/36 Praxis rings for a couple months now. I have not noticed anything out of the ordinary. That doesn’t mean something out of the ordinary isn’t happening though. But I have never noticed any changes in power or jumps or inconsistencies and i watch my power stuff pretty closely.
That would be interesting, as when you talk to Quarq, they often recommend Praxxis rings if you don’t want to go w/ their Yaw rings.
That article is fairly old though.
Been running my Elsa on Praxis rings. Never noticed anything weird and when I ride on my KICKR, reading power independently, I get consistent results. My Quarq usually is a 5-7 watts above the KICKR which is expected since its upstream in the drive chain.
Did you re adjust the the slope after switching chain rings? I am thinking about adding them to my Riken but if i remember right Sram suggested sending in the quarq to have the weight applied to the crank arm and the slope to be adjusted. I guess if you use a torque wrench to tighten each bolt down correctly there should not be too much difference between the stock sram rings and the new Praxis Works rings.
sorry, got the PM installed on a new bikes so no need to calibrate. IIRC, you can change chainrings with the Elsa and Riken without recalibrating.
I’ve been using Praxis rings on my Quarq for a few weeks now. No issues. Readings were about the same. My bike shop says they’ve installed quite a few Praxis rings on Quarqs without issue, so I’m thinking you’ll be fine.
Are you on an Elsa/Riken or an older model? You didn’t have it recalibrate or adjust the slope after changing rings.
I’m running an Elsa with 52/36 Praxis rings. Didn’t do anything but swap out rings. Readings seem to be consistent.
Yeah - I’m on an original Quarq - no Elsa/Riken. Might be a different situation. I’ll drop them an email.
Using a Riken. I didn’t do any recalibration, but my bike shop might have. I can ask. I normally just do the manual recalibration by pedaling backwards during my rides.
Hey folks,
Adam@praxis here as a couple people asked me to chime in on this.
Here is our statement on our site as we’ve worked with Quarq HQ and the service team there have tested our rings.
Hope this helps clarify.
POWER METERS - Do your rings work with the spider based power meter systems?
YES – Our rings work great on Power2Max, SRM, and newer Quarq systems. Some older Quarq systems were finicky in calibration and per Quarq our 52/36 set and 53/39 Clover calibrated best on those. * But the newer Quarq Elsa and Riken are no problem at all.* Mount them up!
Thanks, I just ordered a 53/39 clover from my local bike shop and I have a older Quarq S975. Do I need to send it in for calibration or can my bike shop do it?
Thanks - so the 52/36 should be okay on an older Quarq.
Hey folks,
Adam@praxis here as a couple people asked me to chime in on this.
Here is our statement on our site as we’ve worked with Quarq HQ and the service team there have tested our rings.
Hope this helps clarify.
POWER METERS - Do your rings work with the spider based power meter systems?
YES – Our rings work great on Power2Max, SRM, and newer Quarq systems. Some older Quarq systems were finicky in calibration and per Quarq our 52/36 set and 53/39 Clover calibrated best on those. * But the newer Quarq Elsa and Riken are no problem at all.* Mount them up!
Rob with Quarq Tech Service here… The older Cinqo models (CR2450 battery) would typically need to be recalibrated when using non stock rings as the differences in the rings thickness and stiffness could affect the spider’s stiffness and would warrant needing a slope adjustment. The Clover and Classic rings where tested and included on our Ring Calibration Table (http://qalvin.quarq.com/cal_tables/) but otherwise, a weighted calibration was required. Any older Cinqo model can have the slope adjusted with our Qalvin program and a USB ANT+ stick. The slope can either be adjusted per the Ring Calibration Table’s recommendations or a weighted calibration can be done with a certified weight (or a kettlebell of at least 45lbs weighed on a certified scale). We can also do a factory calibration here at no charge other than shipping.
The newer Quarq units (CR2032 battery) feature Omnical to allow you to swap rings without affecting the spider’s stiffness. Technically this was tested with all SRAM rings and found that they all worked great. We have plenty of customers using Praxis rings and typically recommend them for those who want third party rings. We have not seen any instances where the use of Praxis rings has required slope adjustment but it would be of no harm to the Quarq to do a weighted calibration.
Just to add to this, here is my experience: I purchased a Quarq Elsa BB30 110 crank with SRAM 50/34 rings installed. I checked the slope calibration with Qalvin and a 25kg calibrated test weight and the factrory slope was spot on. I then mounted Praxis clover 52/36 rings using SRAM steel chainring bolts sequentially torqued to 12 NM, and rechecked the slope. The slope was unchanged (within 0.1%).
I sent it to you guys to calibrate when I put the Super Road 50/34 rings on. Would it need to be calibtated again if I stayed with Super Road rings in 52/36 instead of Praxis Works rings? I’m 8 weeks out from IM and now isn’t a good time to be without my PM for a week.
Rob with Quarq Tech Service here… The older Cinqo models (CR2450 battery) would typically need to be recalibrated when using non stock rings as the differences in the rings thickness and stiffness could affect the spider’s stiffness and would warrant needing a slope adjustment. The Clover and Classic rings where tested and included on our Ring Calibration Table (http://qalvin.quarq.com/cal_tables/) but otherwise, a weighted calibration was required. Any older Cinqo model can have the slope adjusted with our Qalvin program and a USB ANT+ stick. The slope can either be adjusted per the Ring Calibration Table’s recommendations or a weighted calibration can be done with a certified weight (or a kettlebell of at least 45lbs weighed on a certified scale). We can also do a factory calibration here at no charge other than shipping.
The newer Quarq units (CR2032 battery) feature Omnical to allow you to swap rings without affecting the spider’s stiffness. Technically this was tested with all SRAM rings and found that they all worked great. We have plenty of customers using Praxis rings and typically recommend them for those who want third party rings. We have not seen any instances where the use of Praxis rings has required slope adjustment but it would be of no harm to the Quarq to do a weighted calibration.
Hi TH3,
For individual tech questions, please email us at thinkfast@quarq.com or call 800-660-6853.
We do not have these rings listed on the Ring Calibration Table but typically you would be within the same spec when staying with the same ring manufacture and model. The tooth count generally has less affect on the slope than the material make up of the ring would.
Thanks - I rode with an 11-28 this weekend and that pretty much did what I needed so no need to change rings right now.