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Correct tire pressure for LT265/70/17?

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Correct tire pressure for LT265/70/17?

 
  #1  
Old 05-18-2004, 08:25 PM
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Correct tire pressure for LT265/70/17?

Does anybody know what the correct tire pressure is for Goodyear Wrangler AT/S LT 265/70/17 tires? The Goodyear manual lists a PSI of 50 for the LT tires and a PSI of 35 for the P load rated version of the same size. The door label, however, lists a pressure of 35 PSI for the LT tires. This seems kind of low to me. Anybody have any suggestions?

Thanks

1999 F150 4x4 5.4 V8 Ex Cab
 
  #2  
Old 05-19-2004, 04:59 AM
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Hello...I have the rs/t 265/70/17 and they work well with 35 PSI...They seem to be wearing even and run straight on the highway ok...The more air you add the rougher the ride I find...
I have a 2001 150 4x4 scab...Note...I don't like these tires driving in the rain...
 
  #3  
Old 05-19-2004, 11:17 AM
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P passenger 35psi max cold (most, not all, passenger tires)

LT Load C 50psi max cold
LT Load D 65psi max cold
LT Load E 80psi max cold

A load C LT265/70R17 does not have as much sidewall as a load C LT265/75R16, so you might be OK with only 35psi.

When empty, I'll run 40psi rear and 45psi front, for a good ride. But when loaded up to go up north, I run 50psi all around.
 
  #4  
Old 01-26-2019, 10:06 AM
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I have a 2004 Ford F-150 FX4 Super Crew Cab and it came with the LT 265/70 17 tires on it. The original tire is P255/70 17 which recommends 35 PSI. I just recently bumped it up to 45 PSI. Do you think that this PSI will work?
 
  #5  
Old 01-26-2019, 11:30 AM
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What is the load range of those tires?
 
  #6  
Old 01-26-2019, 02:19 PM
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Originally Posted by glc View Post
What is the load range of those tires?
The load range on my tires say “Load Range E”
 
  #7  
Old 01-26-2019, 04:40 PM
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You always use the tire placard. The vehicle manufacturer already calculated the psi to their specs. Load range is only the tires max before failure. This is a common mistake. The tire manufacturer has their spec on the tire only for max psi before failure and poor performance.
 
  #8  
Old 01-26-2019, 04:59 PM
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Originally Posted by Scott Vrabel View Post
You always use the tire placard. The vehicle manufacturer already calculated the psi to their specs. Load range is only the tires max before failure. This is a common mistake. The tire manufacturer has their spec on the tire only for max psi before failure and poor performance.
Then I can run 35 PSI in my tires? That’s what my truck calls for
 
  #9  
Old 01-26-2019, 05:38 PM
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Originally Posted by Matt Sayers View Post

Then I can run 35 PSI in my tires? That’s what my truck calls for
Yes. I have an 04 FX4 Supercrew. Placard says 35 and thats what I run. I get great mileage n ride outta my Nittos
 
  #10  
Old 01-26-2019, 06:17 PM
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I would not run load range E tires at only 35. I'd put at least 45 in them.
 
  #11  
Old 01-26-2019, 08:22 PM
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Wow.. More posts today on this thread then it originally had in 2004.. ha, ha!

Go by the tire placard when you are running completely different tires from the P rated things the truck originally came with?? Ha, ha...

I guess I just like a tire that does not feel flat all the time..

To the poster that reincarnated this 14 year old post, run the placard psi and see how you like it. If it works for you, there you go.. If not, put some more psi in and re-evaluate. Adjust accordingly.. There is no set pressure that is going to work for EVERYONE... Some like their tires soft, some like them firm.. Choose your own flavor. That's why they make tire pressure gauges and air pumps.. ha, ha..

Yes, I'm being an *** on this post.... So what..

Mitch
 
  #12  
Old 01-26-2019, 08:57 PM
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Thank you everyone for your input
 
  #13  
Old 01-30-2019, 12:09 AM
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Originally Posted by Matt Sayers View Post

Then I can run 35 PSI in my tires? That’s what my truck calls for
Not really.....tire pressure relates directly on your installed tires & the any load you are carrying !!
LT tires & I am presuming they are a "D" rated tire will have a maximum pressure of 80lbs. Read also the weight rating on the tire !!
If you are carrying/towing etc maximum rate then you would need 80lbs tire pressure....but only when that weight is in the box !!
If you don't change the pressure when empty you will get extra wear @ the center of the tires etc. also you will lose traction in rain or snow !!
Not changing pressure will result in tire wear...of course short time or distances are okay....use common sense here....
I carry about 800 lbs in the box all the time & also do a lot of highway driving.....I run 50/55 lbs pressure all the time & get good performance from my tires..
Like I said you have to use your head for your driving conditions...
 

Last edited by Maco; 01-30-2019 at 12:12 AM. Reason: info
  #14  
Old 01-30-2019, 12:35 AM
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LT tires come in load range C, D, and E. Max pressures are:

C - 50
D - 65
E - 80

P-metric standard load is 35, XL (extra load) is 41.

I have seen standard metrics (non-P) at 44 or 50.

The placard on the truck is for the type tires it came with. LT load range E tires are not designed to run with only 35 even with no load, hence my recommendation to run at least 45.
 
  #15  
Old 01-30-2019, 12:45 AM
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My XL rated tires are max 50 psi and #2833 load each. I run them at 40 psi just 'cause it feels right to me even empty.

Mitch
 
 


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