This week I took the wheel from my Walker Matilda in to be replaced. The clerk, a pleasant fellow, carefully examined the wheel and asked, "Looks like a case of high speed and abnormal wheel vibrations. Let's see what we can do."
After he and his fellow workers combed their inventory he returned with a heavy duty plastic and rubber wheel that should last forever. I had to go to Home Depot for a couple of longer bolts because these wheels are about 1/4 inch wider than the old ones.
So I'm back again experiencing high speed and abnormal wheel vibrations.