fj12ryder wrote:
FWIW I measured the tire temperature with a non-contact infra-red gun, and it measured a quite a bit hotter than the TST read-out. In the neighborhood of 15°-20°. If the TST was showing 105°, the gun was reading closer to 125°. Just was wondering if everyone else was showing the same variation.
I noticed that too, but then realized that I was measuring the actual surface of the tire and the TST is measuring the air temp inside the tire. It doesn't take long for the outside surface temp to fall while in the shade or on cooler ground such as concrete instead of asphalt. I use an infrared thermometer at each stop, and check tires at the center of the sidewall, tread and also check the hubs(especially after heavy braking). Amazing at how much difference there is in temps, even form the sidewall to the tread.
