[Christ]

The Nylon Locking Nuts wouldn't even need to be there, if you used springs, unless you wanted a "stop" point in order to prevent the pan from buckling.

One possible scenario is that the tire is so flat that it pushes the pan until it contacts the rim... just before this point, you may want a "stop" that prevents this from happening in favor of just letting the pan contact the rim... if your tire's gone that flat while driving, it may not be salvageable anyway, you know?

Of course, with nearly 1.75 inches of overlap from the pan to the rim, a truly flat tire will have the pans riding on the road, possibly cutting the tire anyway.