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How often do you inspect your tires for damage?
Oh really? Strange that nobody have noticed that before, don't you think?
So the tires were seriously under inflated!
Again, your tires must have been under inflated. Notice that very low profile tires require a higher pressure. For 195 X 60 X 15 it is around 30-32 psi.
Obviously, don't drive with incorrect pressures. And if there is a tire problem, then fix it first.
No there isn't any design issue. The issue is that you haven't looked after the tires; you have probably driven over a sharp obstacle at speed, heard the bump but not investigating any possible damage to wheels and tires. What do you expect us to do? nobody in this group buy into your theory. You have damaged your tires by improper use and now wants to find someone to blame. Sheesh!