You can select different chain rings and do the calibration change using an iphone app and a ant+ dongle on the Quark - they provide the numbers you should enter on their website based on your selected rings. That might not have been available when you were looking but has been out for sometime now.jcjordan wrote:The distributors for Power2Max are in NZ and they are a delight to deal with.
I went with P2M over Quarq due to the problems with needing to factory recalibrate every time you Chang the rings.
I ever so glad I did as I have seen some real quality control issues from the friends that I ride with. Plus the external magnet need for cadence seems to be a derailleur killer.
P2M did have a temp problem with the earlier units (although mine never did) but the newer versions have locked this.
I think the main benefits when comparing to SRM is the usability by the average rider. Plus it's about half the cost.
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If you have a calibrated weight you can also re-calibrate them at home using the same free app with the ant+ dongle.