Originally Posted by
oneclick
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.
Fair enough: though it sounds like a modern bike so it should be relatively easy to find a rim that matches pretty closely; and you do have a little wiggle room on length (1-2mm). Spokes too long can be filed; shortish can be used provided there is good engagement in the nipple..and patience is a virtue for everyone building wheels!
Personally I agree with previous posts that the cost of doing this even completely DIY is beyond reasonable (if spokes are needed plus rims and associated tools you are well into the hundreds of dollars) but if someone is inspired and wants to do it why not?