Originally Posted by San Rensho
I would get a new rim, but if you want to re-lace it, cut it out of the old hub, lay it on a glass table and see how badly bent it is. If the gap between the rim and the glass at any point is more than 10mm or so, it probably will not be re-usable.
…but before you cut the spokes, release the tension by undoing the nipples a few turns at a time - if you just cut the spokes without releasing the tension, you run the risk of damaging the rim.
- Wil