Tire Pressure
Hi I have dual tires in the rear of my motor home & obviously 2 in the front I know front tires are to be set at 65 psi max & rear tires at 80 psi What is considered a safe range among all 4 rear ...
Forum Discussion
4x4van wrote:Ohio_Engineer wrote:
IR guns are OK for conductive material such as metals but rubber is an insulator so you are not reading the hot part of the tire. Temperatures can vary by 100F within 1/4".
While the interior surface of the tire may be even hotter, the tread IS the hottest exterior part of the tire, and an IR temp gauge will quite easily show that. Is it 100% calibrated accurate? Of course not, but it IS accurate enough for the purpose, which is looking for an out of the ordinary temp increase.
I've NEVER seen a difference in temp across 1/4" on a tire. In fact I've never seen the surface temp vary more than 5 degrees across the entire tread surface. Considering that a typical running tire tread temp would be somewhere in the 100-150 degree range, I really hope that your "100F within 1/4"" comment was a typo. The idea of a 100 degree variation ANYWHERE on the tire is illogical.
You are correct. I overstated the temperature spread. It is only 50F spread between the base of a groove and the outer tread surface. All you have to do is to be sure the entire area you are measuring is withing the "reading circle" when you use your IR gun. I sent you the link with the temperature data.
