Hi all,

Probably asked before, but I’m struggling with my power readings at Zwift. I use a Wahoo Kickr for Zwift and always connect Zwift using the Wahoo powermeter. I however also have a Stages ultegra (left Crank only) powermeter on my bike. I realized that the readings differ a bit, since I measure higher values outside when the Stages powermeter.

To investigate further, I did an analysis yesterday by measuring both power outputs and made a comparison using Zwift power. The results are shown below; as you can see, they perfectly overlap in terms of power peaks, but the Stages is consistently about 8-10% higher. This makes it difficult to do my trainings inside and outside. One explanation is the fact that I’m left handed and probably have a slightly stronger left leg, which is being read by the Stages PM.

Does anyone have a suggestion how to resolve this? Is my Wahoo output too low? I recalibrate about weekly. I wil obviously be flagged on ZP when I change to my Stages. Furthermore, I think my stages output is really a bit too high but I can also underestimate my efforts…

Roy

Wahoo. Stages

1 Second 688 watts 709 watts(+2.96%)

5 Seconds 623 watts 648 watts(+3.86%)

15 Seconds 562 watts 576 watts(+2.43%)

30 Seconds 518 watts 529 watts(+2.08%)

1 Minutes 470 watts 477 watts(+1.47%)

5 Minutes 373 watts 408 watts(+8.58%)

10 Minutes 355 watts 386 watts(+8.03%)

20 Minutes 325 watts 357 watts(+8.96%)