Originally Posted by
dabac
I'm not too sure on how much added security that would actually bring. Sure, a thicker axle will be less prone to stretch to the point where the nuts can slip past the lawyer lips. But a nutted axle wouldn't be immune to the forces that makes quick-releases unscrew.
I'm not a mechanical engineer, but my thought is that on a nutted axle, the two nuts are virtually independent of one another. If one of them works loose, or is forgotten about for some reason, the other one is still there. What I like is the redundancy -- a single mode failure is not a disaster. Even lawyer lips don't protect from breakage of the skewer, but only a particular user error.
But thinking about it, I'm not sure how lawyer lips plus nuts would be an improvement.