Thank you Nicolas!!
My question is around power readings compared to my Tacx Fortius trainer. I do not expect the two power readings to be exact, but I did hope it would be closer than 10-20 Watts apart.
My new P2M is reading 10-20w less than my trainer. Is there a calibration I should be aware of?
It is also worth noting that my P2M power was all over the board while my Tacx was reasonably steady.
I calibrated my Tacx before I started and then warmed up. I even stopped a couple time to let my P2M auto-cal.
My cadence is spot on.
Any words of wisdom?
I switched from a powertap to power2max. I found similar results as described above...
I did two tests where I used the powertap and power2max. Overall the power2max was 8 watts less. On a trainer with a Kurt Kinnetic road machine, in a specific gear at a specific cadence... I found my powertap watts to be very steady throughout a ride. With the power2max, I found for the first 20-30 minutes the watts to jump around a little bit after a calibration. When I would notice it to be a little high or low, I would not peddle for 2 seconds and let it recalibrate. It seemed to steady after 20-30 minutes.
Another issue, after a hard interval, I will stand up to stretch my legs, I found this could really screw up the calibration. Especially if this is in the first 20-30 minutes of a ride, I have seen my watts jump 15-20 watts. So anytime I stretch, I sit and calibrate again and be careful to keep my feet still and light.
I have now gotten the hang of calibration, but I'm not thrilled with how it works. I'm finding myself paranoid and thinking about my pauses/rests and if I'm screwing it up.
I have had a couple instances where the power stops for 5-10 seconds also.
Can you give any insight on how it calibrates, what might potential screw it up?