Hi Zwift team!
My short question is: is zpower accurate when using properly a modern non-smart home trainer?
The background of this question comes from regular comments I see (on Strava, Facebook, forum...) claiming that zpower is 20-30 watts higher then what you would get on a smart-trainer. Then, I see some more comments claiming that smart-trainers are (again!) 20-30 watts higher then power meters.
I know that Zwift has spent an extensive time to calibrate a LARGE range of trainers, smart and non-smart. I really wonder why you would have introduced such a bias, it doesn't make any sense to me. I understand that zpower makes mistakes (or cheating) easier, but for someone who does it properly (a modern trainer, regular wheel size, proper tire pressure, reliable speed sensor, right weight/height in profile, ...) it should be just right, no?
PS: I have a lot of fun on Zwift (including racing), but as a mountain biker who has already invested too much in a road bike and trainer I can't picture myself spending more, just to prove my power is not 40 watts over real value. I'd rather get this come from you, free of charge :)