Question About Tire Inflation Presuure

[antelopedundee]

I have 8 ply load range D tires on my 2006 Ford Explorer. Most of the time I don't carry much beyond the posted curb weight. What would be a reasonable tire inflation pressure for general driving including interstate driving? I'm thinking 44 psi. Sound about right?

 

[David58]

Sounds pretty good, on the high end. I have an Xterra, tires I run do best at 42-44.

 

[El Jason]

Tire Pressure Calculator

Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.

tiresize.com

 

[antelopedundee]

Thanks for the replies.

I did find this with a search.

minimum inflation pressure for 8 ply tires - Bing

Intelligent search from Bing makes it easier to quickly find what you’re looking for and rewards you.

www.bing.com

I'll just have my local shop check them.

 

[El Jason]

Thanks for the replies.

I did find this with a search.

minimum inflation pressure for 8 ply tires - Bing

Intelligent search from Bing makes it easier to quickly find what you’re looking for and rewards you.

www.bing.com

I'll just have my local shop check them.

65 is max and I doubt you need to run that. Just use the calculator I posted and you’ll know. Probably 40 is plenty.

 

[Benteen]

I just bought Firestone Transforce H/T2LT 275/65R18 Load E 10 ply Light truck tires for my 2020 GMC 1500 Crew-Cab 4wd. Tire shop put in 40 psi, the tire calls for 80psi max so I put in 60. The truck is occasionally used for an 80 mile trip with over a ton of sacked cattle feed on it.

Do y'all reckon 60psi is good or should I pump up to near max? I notice the psi dash indicator varies a much as four pounds depending on outside temp and speed.

 

[HiMtnHntr]

When you are running a tire drastically different than stock tire I’d run closer to what the door jam sticker says vs what the tire says. 60 psi is going to rattle your teeth loose.

 

[Benteen]

When you are running a tire drastically different than stock tire I’d run closer to what the door jam sticker says vs what the tire says. 60 psi is going to rattle your teeth loose.

You are right about the rough ride at 60 psi but I ran the originals at 48 to 50 and they weren't as rough as these were when I left the tire shop with 40psi in them. The tire size is the same as factory but a much tougher tire.

 

[El Jason]

When you are running a tire drastically different than stock tire I’d run closer to what the door jam sticker says vs what the tire says. 60 psi is going to rattle your teeth loose.

The door jamb sticker is for the factory tire. An LT tire with an higher load rating will need more air pressure than what the door jamb says.

 

[Benteen]

The door jamb sticker is for the factory tire. An LT tire with an higher load rating will need more air pressure than what the door jamb says.

That's what I was thinking. The new tires display a 80psi recommendation. The tire dealer put in 40psi and I upped it to 60, might go ahead and put close to 80 and suffer the stiff ride.

 

[El Jason]

That's what I was thinking. The new tires display a 80psi recommendation. The tire dealer put in 40psi and I upped it to 60, might go ahead and put close to 80 and suffer the stiff ride.

80 is max. If you want to run that, be my guest. You won’t like it.

 

[turbobrick]

When I run a non-spec tire on anything, I use the chalk method to figure out pressures. You use chalk to draw a heavy line across the tread of each tire, sidewall to sidewall. Then, drive the vehicle on a paved surface long enough to get them warm. Then, you check the chalk and see how much of it remains. If its only worn off on the center, you need less pressure, if it worn off just at the shoulder/sidewall, you need more pressure. You're looking to get even contact across the entire contact patch. I just did this on my Jeep YJ with 33s, I inherited the Jeep and the ride was terrible. I did some suspension work and it improved, but still wasn't as good as it could be. With this method, I dropped the pressure from the 38 that my late aunt had in it, to 26 with a huge improvement in on-road handling, and no effect on fuel economy.

 

[Hem]

I once put pressurized air to a bike tire until it burst.
That was loud.

 

[Deleted member 16864]

I once put pressurized air to a bike tire until it burst.
That was loud.

I have some horror stories about H-47 and H-60 tires.

 

[Deleted member 16864]

I have some horror stories about H-47 and H-60 tires.

Here’s one without all the gory details.

HELICOPTER TIRE CAGE DEPLOYED TO IRAQ

On an October day in 2003, two soldiers were doing routine maintenance on a UH-60 Black Hawk helicopter in Iraq when the tire they were inflating with high-pressure nitrogen exploded. The explosion…

www.courant.com

 

[MTLabrador]

That's what I was thinking. The new tires display a 80psi recommendation. The tire dealer put in 40psi and I upped it to 60, might go ahead and put close to 80 and suffer the stiff ride.

80psi is not the recommendation. It’s the maximum safe pressure for the tire. 80 psi for a half ton pickup is just stupid. It’s not just a stiff ride, you also won’t get much tread contact and you’ll struggle to find traction.

I’m usually somewhere around 38-40 on a half ton with load range E tires.

 

[HiMtnHntr]

Had a 150 I had E’s on once and I generally ran 42 or so. That’s why I said run closer to the door sticker… most of the 1/2 ton are going to be in the 35-40 range with a stock tire.

 

[pabearhunter]

Whatever the number is on the decal located on the door jam.

 

[hank4elk]

Load E I have 60lbs in the 80lb max and 45 in the 60lb max. I have dropped them down on very rough roads and refilled asap. More towing.
Rubber softness these days is an issue on dirt roads.
Coopers have good make up on my uses.

 

[Benteen]

What would be recommended when I put 2200 lbs. of feed in the truck for an 80 mile trip on fairly decent pavement?