lance camper porpoising and tires cupping

ardvark wrote:
Man, go with the obvious suggestions above and see if the problem is still there on other roads. There are some stretches where I don't care what you are running, in my opinion, it's going to porpoise.

I'm with ardvark. When we travel abroad, inevitably there is a stretch or two of highway (usually poured concrete with expansion cracks) that causes our set-up to porpoise. I simply adjust my speed up or down until the porpoising is eliminated or greatly diminished. Works for us.