The correct way to do it needs a contact thermometer. When the tyre pressure is right, the temperature of the tread is the same across the width of the tyre (measured immediately after running.) If it's hotter in the middle, it's over inflated. If it's hotter at the edges, it'sunder inflated.
I really don't think tyres are that pedantic, just make sure it's not squished at the bottom.
I know racers do it that way, but it's not very helpful for our typical trip to the supermarket and back.
The correct pressure becomes far more important at high speed running - to prevent the tyre overheating, even more so with a full load. The usual trip to the supermarket unlikely to involve high speeds.
I couldn't follow this up before because I was knocked low by the flu epidemic for about a month.
However, my KIA dealer checked the system, said it was fine and bumped the pressures on all four tyres to 38psi. (The recommended psi is 36). The gauges report accurately but the ride is a bit bumpier. :)
Thanks for the feedback. Very interesting apart from the those with Tourette's issues.
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