Pressures for LT E Tires

Atlee wrote:
Not exactly apples to apples, but this is what I do with my F150.

My 2014 F150 has the HD payload pkg, so it came with LT245/75R17 LRE tires.

The sticker Ford put on the door says to put 55# in the front tires and 60# in the rear tires. So that's what I keep my LRE's at.

I do not change when I hitch my 6500# trailer. The truck does just fine.

You don’t need to since you’re already running the tires higher than they need to be empty. That’s a bumpy ride though....

I found it easier to just buy a truck that comes with E rated tires as standard equipment. :)

Not exactly apples to apples, but this is what I do with my F150.

My 2014 F150 has the HD payload pkg, so it came with LT245/75R17 LRE tires.

The sticker Ford put on the door says to put 55# in the front tires and 60# in the rear tires. So that's what I keep my LRE's at.

I do not change when I hitch my 6500# trailer. The truck does just fine.

When I used LT tires on my half ton, I followed very closely to what riven1950 does. 40psi unloaded and 50-60psi loaded/towing. Tire wear was even, ride and control was great. GM recommends 50psi front and 60psi rear for my 3/4 Suburban with LT-E tires about 6500 pounds dry and 8600 pounds GVWR. I run about 5psi more than that in summer towing. It seems unlikely that any half ton needs more than 60psi.

E tires are a great upgrade for a half ton.
Don’t make it out to be a science project as some would have you believe. And they do not ride any rougher than P or XL tires if you adjust the pressure.
Whatever pressures you liked with the P tires, E will ride the same at only nominally less. Remember it’s air not the tires that hold the truck up.
Towing, you won’t adjust the front much if any. Rear, I can’t imagine more than 50-60psi being necessary to stiffen up most loads. It won’t hurt anything to run them stiffer except your fillings in your teeth! And maybe a bit of tire wear if you’re totally excessive.

riven1950 wrote:
18 months ago I did the same. 2013 F150 , going from P to Michelin E rated. TT is about 6200 +/- loaded.
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I contacted Michelin either by phone or chart, can't remember which, and they told me the E tires @ 55psi would equal the max load rating that the P tires had. Of course with stiffer sidewalls. No need to go to 80psi.
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This. I did the same thing.

Michelin wanted info on the type and pressure of OEM tires, and then came back with the proper/equivalent psi for LT-Es.

Didn't get a new sticker though. Would have been nice.

There is an industry-wide procedure for setting the recommended inflation pressures for your new tires. It’s very basic. The Original Equipment tires are the benchmark for all subsequent replacements. So, an experienced installer will ensure that the replacements are compatible with the OE wheels and that new valve stems will support the increased inflation pressures. The replacement tires, at the very minimum, MUST provide a load capacity - via inflation - equal to what the OE tires provided at the vehicle manufacturer’s recommended inflation pressures found on the vehicle tire placard, certification label and in the vehicle owner’s manual. Inflation pressures between recommended and tire sidewall max are optional.

NHTSA allows the use of an auxiliary tire placard to describe such replacement tires. The new tire size and it’s recommended cold inflation pressures should be depicted on such placard and it should be affixed adjacent to the OE placard. Notations should also be made in the vehicle owner’s manual.

Note: Inflation to the load carried is not a safe or acceptable procedure. Have you ever seen a motorized vehicle tire placard that didn’t provide some percentage of load capacity reserves for the GVWR?

I use 48-50 rear for towing. Sometimes for short haul I don't even air up. E tires are like night vs day over P tires. You'll be happy.
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My old F150 came with LT-C tires (50 psi max) and the door says run at 36 psi.
I run 45 front and 50/60 in the rear. I now have E rated tires same size as oem.

"ONLY WAY" to know is go to the CAT scales empty and also fully loaded. Add 10psi of the front tires and 5 psi to the rear tires based on what the charts say for that tire. Do this and your tires will wear evenly and have the best stopping power.