Login required to started new threads

Login required to post replies

Re: Official power2max support thread [power2max]
An interesting Power2Max on a trainer for you here. This is from my old Power2Max classic unit, (unfortunately stolen with my bike this past week, just ordered a new one. Would appreciate ASAP shipment as I've got big race with a TT I'd like to pace off power in two weeks... but besides the point...). Back to power meters and data. I have a curious case involving data differences between my power2max unit and ergometer trainers. The data example I have is from using a kickr, I have experienced similar on a power beam.

So here are the plots showing the difference numbers.



Early on it is pretty similar... I do a spin down of the kickr and it goes way off. (I had been spinning for 10 minutes warming up before I started collecting data oops). After the first interval I do another spin down, it comes closer together. After the last of that set I do another... a little closer. Nonetheless... about 20w higher the kickr read. What I find odd is that they matched perfectly before the spin down calibration. The numbers the kickr gave me felt the same, it felt harder to achieve the same numbers on the power2max and the kickr numbers were just a hair lower than usual road efforts (3-5%). Which makes the p2m numbers about a whopping 15% off! Was there perhaps some sort of issue where the nature of the spin down created a bad zero offset reading for the p2m?

I don't ride ergometers very often, I ride rollers usually never had such issues there. IDK what the issue is here, but it obviously didn't stop me from coming back for the same thing.

---------------------
Jordan Oroshiba --- Roadie invading Triathlete space for knowledge access
Last edited by: joroshiba: Apr 23, 15 12:04

Edit Log:

  • Post edited by joroshiba (Lightning Ridge) on Apr 23, 15 12:04