Originally Posted by
markk900
I think this website will be very useful to your learning curve…..
https://www.sheldonbrown.com/wheelbuild.html
Sheldon does not explicitly talk about motorized hubs but that is mostly irrelevant to what you want to do; just treat the hub like it’s got big flanges and shorter spokes. And once you find rims that work for you the swap is slightly easier than a new build as you can lay the new rim over the old one and just move the spokes over following the same pattern.
Unfortunately it won't be that simple.
Unless the spokes required for the replacement rim are *exactly* the same length, they will also have to be replaced - meaning old ones removed from the hub and new ones inserted.
Though possible to do one-at-a-time, that is much more complex than just building anew from completely separated bits; times 36 for a first-time wheelbuilder might need heroic patience.