Yes, a rim doesn't take a set when it pringles....back off the tension a bit, and it flips back to straight.rogerzilla wrote: ↑8 Apr 2021, 9:00pm A pringle is generally elastic and will vanish if you slacken each spoke about half a turn. It is basically Euler buckling in a ring rather than a column - the rim is trying to get out of the way of the compressive load. The narrower and lighter the rim, and the smaller the box section, the more likely it is to pringle.
To get a permanent pringle, you really have to be going for it!
In a crash where the wheel gets a large side load, you can get a superficially similar-looking wheel, with 4 big waves, 2 left and 2 right, but with some spokes slack...then the rim has taken a set, and its pretty difficult to get them back to a condition which will get you home, never mind last a week.