Tires From Walmart?

If it’s truly impossible to know the failure rate of Walmart tires vs the failure rate of tires sold by other companies (and absent any cites to the contrary, I agree that it is), then saying “they’re cheaper, so they’re obviously less-safe,” is not only fallacious, it’s screamingly ignorant. In fact, I’m pretty sure it qualifies as libel.
I’m mostly confused about your association between low cost and lax material/safety regulations. Walmart accomplishes lower pricing by taking advantage of “economy of scale.” It’s an economic term meaning they can undercut everyone else and make a razor-thin margin on any product, but still come out ahead because they will sell 10,000 times more than any local company could ever hope to.

You have an anti-Walmart agenda, and I’m onto it. There are plenty of REAL reasons to dislike Walmart–their crappy wages, scheduling employees for 35-39 hours a week to avoid giving them full-time benefits, the way they crowd out mom-and-pop stores. Why not pick on Walmart’s *real *problems, instead? By inventing fake ones, you come off as hysterical and eminently ignorable.

When we last bought new tires, we got Michelins - I got the impression that those were the only American-made ones available. Even Firestone / Goodyear etc. were made in China. In other words, the only American-made tires were the ones from the French-owned company.

However, doing some googling now suggests this is not necessarily true:
Buying Union! How to be sure you're buying USW-made tires. | International Brotherhood of Boilermakers.

As I recall, the locally-owned shops were significantly more expensive than the chain stores, so we went with NTB for our tires. Didn’t even consider Wal-Mart (and I’d have avoided it anyway for similar reasons to yours).

Why would you suspect inferior product/service from WalMart?

Sheesh! Get over yourself. If you don’t like WalMart, don’t go there. Spend more for less somewhere else.