On Wed, 19 Jul 2017 12:03:58 -0700,
Bob F wrote:

But you state it as fact. Use a little common sense. That article is
written by an idiot.

It seems that Ed Pawlowski, Frank, and I are the only ones who are trying
to quote from real articles.

Here's a quote from the LA Times on the subject which backs up the Cooper
Tire assertion that there are too many variables involved but in most
instances of larger tires, you lose fuel economy.
http://www.latimes.com/business/la-f...y03-story.html

"all else being equal, bigger rims and wider tires are heavier, are less
aerodynamic and create more rolling resistance."

But notice they talk about wider tires, which I was trying to keep out of
the equation.

They do say that every tire in and of itself has a different fuel economy,
which backs up what Cooper Tire said, which is that most cars won't get
better gas mileage mainly because of the complexities involved (including
the torque curve and resistance of each tire itself).
"Others who upgrade to oversize rims and low-profile tires -- which are
known to increase fuel consumption -- may not realize what a price they're
paying".