While investigating another problem, I noticed that the timeseries in the FIT files exported from TR have some sort of drifting time offset when compared with the data I get from Zwift and my ELEMNT for the same session.
Here’s an example: DC Rainmaker Analyzer
Easiest to see by looking at the power. In this case I have three power readings: TR and Zwift – both from my KICKR – and an independent one from my power2max (connected to my ELEMNT head unit). You can see that everything starts off fine, but an offset between TR and the other two gradually develops. After around 10 minutes, the TR power reading is leading the other two by around 20 seconds, and by the end of the workout the difference is about 30 seconds!
In this experiment TR was controlling the trainer in ERG mode and Zwift was just receiving the power reading (both running on my Mac). However, I’ve noticed the same thing in all the comparisons I’ve done of TR against other data sources.
What gives? Is this a bug in TR?