I'm under pressure! Or not?
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Junior User
Joined: Jan 2004
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From: Texas
I'm under pressure! Or not?
What tire pressure should I have in my Procomp XTerrain LT315/75R16's on my 96 F250 Long bed? I can't find this information anywhere. It's not on the tire either.
I think My truck has a 8800lb gross vehicle weight. I use the truck primarily for street driving but occasionally do a bit of hauling.
I know the pressure would be less when I'm out in the mud but I was wondering what it should be for normal day driving..
Thanks!
I think My truck has a 8800lb gross vehicle weight. I use the truck primarily for street driving but occasionally do a bit of hauling.
I know the pressure would be less when I'm out in the mud but I was wondering what it should be for normal day driving..
Thanks!
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Joined: Jan 2003
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From: Magrath
It really depends on how the tires wear or sit on the ground. Every truck and tire is different. I run 40 in my Bridgestones on my F150, but I usually have 2-300lbs in the back. You could run anywhere from 30-80. (80 would only be for Load range E while under a load). In my old chevy, I ran 26 with my 255/70/r15 on my 8" wheels.
Just an off hand guess, I would run them at 34
Just an off hand guess, I would run them at 34
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Junior User
Joined: Jan 2004
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From: Texas
Thanks for the tip Couleeman.
I'm currently running at 45. I don't know if these Xterrains are reated up to 80. I know my old stock F250 tires were but they were a different animal. I thought someone might specifically know what Xterrains were rated at.
Thanks!!
I'm currently running at 45. I don't know if these Xterrains are reated up to 80. I know my old stock F250 tires were but they were a different animal. I thought someone might specifically know what Xterrains were rated at.
Thanks!!
Originally posted by couleeman
It really depends on how the tires wear or sit on the ground. Every truck and tire is different. I run 40 in my Bridgestones on my F150, but I usually have 2-300lbs in the back. You could run anywhere from 30-80. (80 would only be for Load range E while under a load). In my old chevy, I ran 26 with my 255/70/r15 on my 8" wheels.
Just an off hand guess, I would run them at 34
It really depends on how the tires wear or sit on the ground. Every truck and tire is different. I run 40 in my Bridgestones on my F150, but I usually have 2-300lbs in the back. You could run anywhere from 30-80. (80 would only be for Load range E while under a load). In my old chevy, I ran 26 with my 255/70/r15 on my 8" wheels.
Just an off hand guess, I would run them at 34
Hotshot
Joined: Oct 2002
Posts: 18,488
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From: The Big, Oregon
I am running my Dunlop 315/75/16's at 25front, 20rear. They aren't wearing any different, and the ride is much nicer. Max on mine is 60psi. I think it's a federal law that the max inflation for the tire must be listed on it.
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From: Texas
You know I thought it was the law as well. I bought my Xterrains when they first came out so I'm thinking it was a manufacturing oversight. They've probably fixed it by now. I haven't looked on the side of the tire facing inward though. I'll do that today.
I believe the Xterrains are 3 ply if I'm not mistaken. I'll try the tires at the pressures you suggested and see how it goes. I'll pump em back up next time I carry a ton of rocks or grass etc.. I actually use it as a truck sometimes.
Hopefully there won't be any excessvie wear as a I can't be shelling out hundreds of dollars ever other year...
Thanks for the info and if anyone has any different suggestions or comments I'd be glad to hear them.
I believe the Xterrains are 3 ply if I'm not mistaken. I'll try the tires at the pressures you suggested and see how it goes. I'll pump em back up next time I carry a ton of rocks or grass etc.. I actually use it as a truck sometimes.
Hopefully there won't be any excessvie wear as a I can't be shelling out hundreds of dollars ever other year...
Thanks for the info and if anyone has any different suggestions or comments I'd be glad to hear them.
Originally posted by Ford_Six
I am running my Dunlop 315/75/16's at 25front, 20rear. They aren't wearing any different, and the ride is much nicer. Max on mine is 60psi. I think it's a federal law that the max inflation for the tire must be listed on it.
I am running my Dunlop 315/75/16's at 25front, 20rear. They aren't wearing any different, and the ride is much nicer. Max on mine is 60psi. I think it's a federal law that the max inflation for the tire must be listed on it.
Fleet Mechanic
Joined: Oct 2003
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From: Forest Hill MD
72f100
Senior User
Registered: Mar 2001
Location:
Posts: 359
View User's Gallery Here's how I figure tire pressure:
Take the front GVWR listed on the door sticker and divide it by 2 (you have 2 tire to support either end of the truck) Take whatever number you get from that and divide it by the max weight the tires can support (printed on the sidewall by the max pressure). This should give you some decimal number. Multiply that decimal by the max pressure and that is the minimum pressure needed to properly support the GVWR of the truck. Do the same for the rear. If you seldom put heavy loads in the back you drop the rear pressure 5-10lb lower than what would be needed to support the max payload.
I got this from him on another forum asking the same type question.
So Thanks 72f150 for the info not me
Chris
Senior User
Registered: Mar 2001
Location:
Posts: 359
View User's Gallery Here's how I figure tire pressure:
Take the front GVWR listed on the door sticker and divide it by 2 (you have 2 tire to support either end of the truck) Take whatever number you get from that and divide it by the max weight the tires can support (printed on the sidewall by the max pressure). This should give you some decimal number. Multiply that decimal by the max pressure and that is the minimum pressure needed to properly support the GVWR of the truck. Do the same for the rear. If you seldom put heavy loads in the back you drop the rear pressure 5-10lb lower than what would be needed to support the max payload.
I got this from him on another forum asking the same type question.
So Thanks 72f150 for the info not me
Chris
