I am facing the same issue, but with Assioma Duo pedals. I haven’t had a chance to dual-record a ride yet, but they seem to read >10% higher than my Kickr. I did a factory spin-down calibration on the Kickr last night and no change. It is an older bike that has never had drivetrain maintenance (like ever), but I wouldn’t think the drivetrain friction losses would be that much. I’ve calibrated the Assiomas, checked the crank length is correct, and have them set to send 1 value to Zwift (since Zwift can’t pair with two separate power sources at the same time).
Of note: I’m about 80% convinced at this point that the pedals are correctly reflecting power input at the pedal, given readings & perceived effort from outdoor riding. There’s also far less than can go wrong by measuring at the point of contact versus literally the final point before the rubber hits the road (rear hub). That said, I now have two important questions – assuming I’m not missing some configuration thing:
- If I’m using the pedals outdoors, should I also use them in Zwift?
- What are the ethics of using an objectively correct power meter for Zwift racing, when the reading significantly conflict with what my trainer is reporting? I absolutely do not want to cheat, but there are two things in favor of the pedals (1. they’re actually accurately measuring power output at the nearest point to my body, and 2. I suspect many, many other Zwift racers use power meters to record rather than their trainer, so now I wonder about what kind of disadvantage I may have had for the whole past year). I’m at a loss as to what to do.
All this said, I know the two of us can’t possibly be the only ones using Assioma pedals with Kickr trainers, and surely many, many more riders must not be seeing this discrepancy, so hopefully someone can help figure it out.