Tire temp with infered gun

I was in the Las Vegas area two weeks ago and also checked my tires with a infa-red gun. Outside temp was around 100 degrees. Front tires were 123 degrees with duels at 143 degrees, inside dual ran at 148.
Tire size was 245-75-19.5 Load Range H. Tire press. cold was front 90lbs. and 95lbs.rear.

The default temp alarm on my TST TPMS is 157 degrees.
It says this is the Michelin specs (whatever that means).
Google searches did not turn up any real information in degrees.
I would like to know more info too.

Last year it was 102 when we were coming home from Atlanta and I didn't get any temps like that. I normally get 5-10 deg. difference from sunny side to shady side of MH. Inner dual is usually about 3-6 Deg. hotter. Toad is always the highest temp. I would definitely check your inflation pressure and your weights. That is just too high.

"Infrared". You're welcome.

Comparing tread temps to what is on a TPMS isn't really apples to apples. Tread temps can vary across the width of the tire.

162 while traveling in SD a couple of summers ago. Out of curiosity I checked a couple of tires on an eighteen wheeler parked near us, they were in the 175 range. Oh yes, the blacktop in the rest area was about 150.
I only get concerned when there is a major variant in one tire.

Beverley & Ken

Dakzuki wrote:
"Infrared". You're welcome.

Comparing tread temps to what is on a TPMS isn't really apples to apples. Tread temps can vary across the width of the tire.

Didn't mean to suggest using TPMS would compare to "infered" :)
Just pointing out that the TST system recommends that as the 'alarm' point.

I use a infrared unit to check my tires when fueling up. It is critical to measure the same spot on each tire. I am not concerned about the tire temps only if there is over a 15 degree temp differential between same locations in other words inside dual to inside dual. If there is then I check tire pressures.

Found some reading on internet. And I know you can believe everything you read there:B But tire temps go up ward of 300 degrees on some tires and racing tires even more. But most tires for everyday use can withstand mid 200's no problem. There is a lot of different things that effect the temps. Rolling restiance and on what type of surface with how much weight etc...
I thought I had a problem at 161 but not even close.

Like stated above, I look for a difference. I rented a tandem axel trailer once and after a few hundred miles I checked the tires temperature, one was 30* hotter that the other 3. Checked the pressure and it was 30 lb. low.
I find the sun and sometimes the engine exhaust causes some difference.

Dusty

This is certainly one of several different ways to drive yourself insane.

There are so many different variables from one day to the next that you can get a wide variety of different readings over the long term, and then you will start chasing perceived problems that do not exist. Some of the many different variables that can affect tire temperature: weight, road temperature, air temperature, speed, amount of braking, tire pressure, condition of the road, what lane you were in, sunny vs cloudy, day vs night, etc.

The main thing you want to be concerned with is an obvious outlier. For example, long term data collection on an average tire will usually result in a bell curve with temperatures generally between 100-175. If suddenly you capture a reading of 275 for several readings, you likely have a problem, otherwise, there is no reason to fret over tire temperature variances. You'll just drive yourself crazy.