I’ve recently bought a pair of Assioma Duo pedals. If I compare my power data with the power data of my Zwift Hub one, there is a difference of 5-10%, with Zwift Power being higher.
The only variable I can adjust in my Garmin Edge is the crank lenght, which is 165mm.
Can someone point me in the right direction to solve this issue?
I dont think you can solve it other than carefully calibrating both devices. There will always be a difference between power meters, you can only try to get them as close as possible. I would assume the assiomas are the more accurate source and the hub is not going to ever match them.
With only two sources of data it is hard to know which is correct (both could also be wrong as an option!)
if you are able to test the pedals on another trainer to give a third data point that could help. If that also shows the same difference you could probably assume the pedals are under reading, if they match the other trainer you could be more confident it is the trainer that is over reading.
Do you also have the crank length correct in the Assioma app? And have you calibrated both items (pedals and trainer) in their respective apps?
If the Zwift Hub is on firmware > 4.0 then it will only auto-calibrate, if the proper conditions are met. I don’t think manual calibration is available for it. I don’t own that trainer to verify it myself. I do wonder if a cycling computer could still calibrate it.
Crank length is set correctly to 165mm.
The pedals are calibrated with both the Assioma app and my Garmin Edge. Same results.
The trainer can’t be calibrated by hand. Calibration is built in, so I can’t really check if everything went well.
If everything is set up right and you’re forced to guess which is more accurate, I would guess the Assioma pedals over a bargain trainer.