Tire pressure in excessive heat

who on this earth ever told you to let the air out of hot tires..???

YOU NEVER LET THE AIR OUT OF HOT TIRES, cuz when they cool NOW YOU HAVE UNDER-INFLATED tires.....

just reduce your speed a bit.

now you have to wait till they cool down, preferably after your 10 hour break, and re-air them to PROPER inflation...

 

Everyone needs to read this over and over. Also buy a thermal temp gun and do the test for yourself.

Run your tires at 100psi for a day, check the temps. Run them at 115-120 the next day and check the temps. You'll see less of a temp increase from the higher psi.

Heat kills tires. Period. Reduce your rolling resistance and the heat will also be reduced.

And yea, all my tires run at 120psi cold.

 

110 on all tires.

100,,000 lbs to 130,000 lbs.

75 mph.

20 years.

Zero problems.

In the morning, when your tires have cooled down. And now they're sitting at 80 psi.

 

You let air out, which will allow the sidewall to flex more and build more heat, and that will lead to the problems you’re worried about. Also check the sidewall of your steer tire. If it says 120psi cold then make sure they’re 120psi cold.

 

Yes.....

 

uh...YOU DID SAY...YOU LET AIR OUT, in your first posting....

i BOLDED and UNDERLINED that you said it...

it was a "rhetorical question" about who told you to do it.....sheesh.

 

Your tire will say max load xxxx at xxx PSI. Whatever it says for the PSI is what it needs to be to keep the sidewall from flexing too much and building heat. If it says 120psi and you’re running 105psi you will build heat. Check them in the morning, don’t worry about checking them when they’re hot. And if you’re concerned then just slow down a bit. As a rule of thumb, I rarely drive much over 65 once it’s 90 degrees and above.

 

Correct. Leave the tire inflation as is on a cold reading.

By the way, kudos for knowing your psi. Many drivers get away with a "thump and go".

On a related note, I see many a driver that set their trailer brakes for the night. I only set my parking brakes. In the morning many of those drivers release the trailer brakes and take off immediately. It takes a few moments for the trailer air bags to inflate. I see many drivers release the trailer brakes and take off immediately, with the trailer dragging on top of the tires, or worse having a flatbed with a winch on top of the tire gouging a wide groove in the middle of the outside tire. Wait a few moments for the trailer air bags to inflate.

 

I run H rated tires. Live in Arizona, saw 118 degrees on my way from Phoenix to the house today. Make sure everything is at 120psi cold (as in check em cold at night, or in a different state) at all times.

How many blow outs have I had in the last 7 years .... none
Last 15 ... 3, all trailer, all not my equipment.

Say no to recaps.

In my experience, not running at max rated tire pressure leads to uneven tire wear. MPG crazies will tell ya under inflated tires will cost you money at the fuel pump too.