Tire Pressure Question...
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New User
Joined: May 2017
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Tire Pressure Question...
Hey guys - New here and I have a quick question regarding tire pressure. Where we work, we have a 2005 F350.
Stock tire pressure for stock tires 275/70R18 states 65 PSI for the front and 75 PSI for the rear.
The truck currently has 295/65R18 tires all around. They are some sort of Wrangler tire, not sure of exact model, but they are more of a all-terrain tire. The truck sticks to the road though.
What would be the recommended cold tire pressure with these? Can I stick with what the stock tires would be?
Thanks for any thoughts!
Stock tire pressure for stock tires 275/70R18 states 65 PSI for the front and 75 PSI for the rear.
The truck currently has 295/65R18 tires all around. They are some sort of Wrangler tire, not sure of exact model, but they are more of a all-terrain tire. The truck sticks to the road though.
What would be the recommended cold tire pressure with these? Can I stick with what the stock tires would be?
Thanks for any thoughts!
Senior User
Joined: Mar 2007
Posts: 373
Likes: 1
From: Anchorage, Alaska
Hey guys - New here and I have a quick question regarding tire pressure. Where we work, we have a 2005 F350.
Stock tire pressure for stock tires 275/70R18 states 65 PSI for the front and 75 PSI for the rear.
The truck currently has 295/65R18 tires all around. They are some sort of Wrangler tire, not sure of exact model, but they are more of a all-terrain tire. The truck sticks to the road though.
What would be the recommended cold tire pressure with these? Can I stick with what the stock tires would be?
Thanks for any thoughts!
Stock tire pressure for stock tires 275/70R18 states 65 PSI for the front and 75 PSI for the rear.
The truck currently has 295/65R18 tires all around. They are some sort of Wrangler tire, not sure of exact model, but they are more of a all-terrain tire. The truck sticks to the road though.
What would be the recommended cold tire pressure with these? Can I stick with what the stock tires would be?
Thanks for any thoughts!
Lead Driver
Joined: Jan 2002
Posts: 8,636
Likes: 4,721
From: Itinerant
They are probably 8 or 10 ply tires which will have a 80 psi max. In all my trucks I always put 65 psi all the way around unless hauling heavy then kick it up to 80 psi. Some guys run lower for abetter ride but personally never could tell a difference it a truck and they ride like trucks. As stated though read the psi ratings on the tire.
Token Redneck
Joined: Jun 2007
Posts: 9,335
Likes: 344
From: Breckenridge, TX
There's a very long answer that involves looking up the load index chart for your tire, comparing that to the original tire, comparing weights, doing math and figuring out the pressures, all to come do to some very specific minimum number like "you can run 62.5psi in the fronts". It really only matters if you're trying to run the minimum pressure you can to solve a tread wear, ride or crowning issue.
Then there's the easy answer of that particular Duratrac is rated higher than the factory tire, so you're fine running the factory pressures.
Then there's the easy answer of that particular Duratrac is rated higher than the factory tire, so you're fine running the factory pressures.
Tuned
Joined: Feb 2017
Posts: 257
Likes: 6
There's a simpler answer... I deal with this commonly at work.
What is the category of tire? If you have passenger (P) tires, get rid of them. You shouldn't have passenger tires on a truck like that. If you have light truck (LT) tires, what is the load range? You should have Load Range E (LRE) but you may also have LRC or LRD. I would recommend at least LRD but LRE is what you should have.
Now, your pressure would be related to the type of tire. This is the max inflation pressure for LT tires:
LRC 50psi
LRD 65psi
LRE 80psi
If you have LRE tires on there, run them at the pressure on the door. If have LRD tires, drop each pressure 15psi. If you have LRC or any lower rated tire, that's a different answer...
What is the category of tire? If you have passenger (P) tires, get rid of them. You shouldn't have passenger tires on a truck like that. If you have light truck (LT) tires, what is the load range? You should have Load Range E (LRE) but you may also have LRC or LRD. I would recommend at least LRD but LRE is what you should have.
Now, your pressure would be related to the type of tire. This is the max inflation pressure for LT tires:
LRC 50psi
LRD 65psi
LRE 80psi
If you have LRE tires on there, run them at the pressure on the door. If have LRD tires, drop each pressure 15psi. If you have LRC or any lower rated tire, that's a different answer...
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New User
Joined: May 2017
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There's a simpler answer... I deal with this commonly at work.
What is the category of tire? If you have passenger (P) tires, get rid of them. You shouldn't have passenger tires on a truck like that. If you have light truck (LT) tires, what is the load range? You should have Load Range E (LRE) but you may also have LRC or LRD. I would recommend at least LRD but LRE is what you should have.
Now, your pressure would be related to the type of tire. This is the max inflation pressure for LT tires:
LRC 50psi
LRD 65psi
LRE 80psi
If you have LRE tires on there, run them at the pressure on the door. If have LRD tires, drop each pressure 15psi. If you have LRC or any lower rated tire, that's a different answer...
What is the category of tire? If you have passenger (P) tires, get rid of them. You shouldn't have passenger tires on a truck like that. If you have light truck (LT) tires, what is the load range? You should have Load Range E (LRE) but you may also have LRC or LRD. I would recommend at least LRD but LRE is what you should have.
Now, your pressure would be related to the type of tire. This is the max inflation pressure for LT tires:
LRC 50psi
LRD 65psi
LRE 80psi
If you have LRE tires on there, run them at the pressure on the door. If have LRD tires, drop each pressure 15psi. If you have LRC or any lower rated tire, that's a different answer...
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Lead Driver
Joined: Jan 2002
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From: Itinerant
Unless the tire was changed by A want a be rocket scientist a Superduty came with E rated tires, now there are some D rated tires that can carry some weight and rated at 65 psi. C rated tires belongs on a car or an older f150 which is not a " 3/4 or 1 ton" truck.
Tuned
Joined: Feb 2017
Posts: 257
Likes: 6
Agreed. I addressed that in my first post above.
Lead Driver
Joined: Jul 2004
Posts: 5,946
Likes: 62
From: in the woods of MA
Tire pressure should be what's stated on the placard on the door/door frame, unless that exceeds your max tire pressure as indicated on the tire, or you've changes the tire size. If the pressure stated on the placard on the door/door frame exceeds your max tire pressure as indicated on the tire, you've got the wrong tires.