If the tires are Schwalbe Pro Ones, I’d be starting to suspect the Prime wheels being out of spec and slightly too large.
Posted this on another thread:
https://www.trainerroad.com/forumuploads/short-url/g768qryHdlM0YBNR7svzHDwhqaG.jpeg
if the diameter of the rim bead is greater than 622.45mm, then your rim is out of spec and installing/removing tires is going to be difficult. If your rim is slightly too large, and tire is slightly too small, then you have a super difficult situation.
The rim bead diameter for the rim should be 621.95 plus or minus 0.5mm, which I’ll claim is a pretty tight tolerance (+/- 0.08%).
More info here: Tight Fitting Tire Application Technique (No Tire Iron) - #6 by bbarrera