On Sun, 09 Jul 2017 09:04:46 -0700, Bill Vanek
wrote:

If tires were a commodity to you and to me, then buying on price would be
fine - but neither of us thinks that tires are a commodity.

Outside of specialty tires, they are a commodity.

I am quite aware of exactly what you're saying, so I welcome that you are a
logical thinker when you say that passenger car tires are a commodity.

To the manufacturer, passenger tires are commodities (almost certainly).
To most consumers, passenger tires "should" be a commodity too!

I knew that would come up so you may note that I crafted the sentences when
I was talking about commodities to indicate that the buyer decides whether
something is a commodity (to them) or not.

I used the example of propane gas since it's one of the definitions of a
commodity (as are pork bellies) but to any one person, if the marketing
organization can convince them that their propane is better than someone
else's propane, or that their pork bellies are somehow better, then they
can charge more, which is really the name of the game.

So, yes, tires are a commodity.
But if I said that here, they'd kill me.