A while ago, I found there was a significant difference in power readings between my Wahoo Kickr and my Stages L/R pedals. At low power levels (<100 watts) they are pretty close, but as the power increases, they don’t track anymore. At around 200 watts, the difference can be 10% or more, with the Kickr always reading higher.
Now here’s the interesting part. This only occurs when I am using TrainerRoad to set the power levels and control the Kickr (in ERG mode). When riding on Zwift without TrainerRoad, or riding “free,” they match power pretty well.
I contacted Wahoo support about this. They replied that since the problem only occurs when using TrainerRoad, then the issue may be with TrainerRoad. They advised contacting TrainerRoad to see if this has been reported as an issue by a number of users. Before doing that, I thought I would post here to see if anyone here has experienced this.
I am now using PowerMatch to work around it, so it isn’t a critical issue for me. Just interested in finding out why this is occurring.