I have a Cycleops Magnus wheel on trainer which I have combined with my Stages PM over the last few years. The Stages accuracy I am happy with but to enable me to keep that on my main bike and use a second bike on the trainer I have been using the Magnus as the power source.
Comparing power tonight on some 5x5 VO2 max intervals it’s clear the Magnus over reads the power by 20-25W, this backs up my feeling from earlier in the week when I did 5x5 (using Magnus as Power source) and my heart rate was too low for the power output.
So to my question, I generally do a 7 minute warm up, calibrate, then do my session. If I did a longer warm up would i likely see a closer match or is it always going to be wide in terms of “matching”?
Tyre pressure always at 120psi, clutch nob on turbo so consistent in that area. The other potential for wide variables is I could have one leg more dominant, but that’s just guessing.
Keen to hear others experiences.