proper inflation?

762mm said:

I run mine at 35 PSI max. My previous Ford I'd run at about 32 PSI for 16 years.

The more pressure you put in tires, the harder it will be on suspension components. Whatever fuel you'll save by running high pressure will be pissed away every time you'll have to do a ball joint, strut or wheel bearing prematurely.

Now, I'm not too familiar with the skinny tires on large mags (never had them, never will), but I believe these will require higher pressures by default, as not to damage the rim on every pothole. These types of wheels really do a number on the suspension components, though... especially on a big & heavy truck.

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TobyU said:

Here we go again.

Most of the time if you put the placard or 35 psi in a E range tire it WILL look low....BECAUSE IT IS!
It was not made to put on a standard load vehicle and have 35 psi in it.
The manufacturer recommendation ONLY considers the original size and load range NOT a D or E.

People keep spouting the OEM pressure as correct but it IS NOT if not the OEM spec tire!


Often 44-45 will look ok and get you by but I find at least 58-50 in an E tire but most ride best at 60-70.
I put at least 60 in all E range tires. If they are on a vehicle that carries heavy loads then they get at least 72...80 if the vehicle is loaded to capacity often.

IF you are not loading it down then the best way is the chalk method.
You have to draw a line across the tread and drive to see what inflation give you the mose even wear across. This will give you the best contact patch which will be best balance between wear and traction.
NOW IF you are carrying heavy loads, the ability of the tires to carry the weight and not blow out or separate and tear belts is more important than the contact patch or wear....SO more air.

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07navi said:

I agree with all that and most people don't realize the E rated tires are at their strongest at their max rated psi. C rated are probably best for these Expys in here and they hold 50 psi max. Much better than a flimsy passenger p rated tire.

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TobyU said:

Yes or at least an extra load pick up style tire.

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TobyU said:

Not co



Not completely true for front end parts. Low tires give more turning resistance especially at slow speeds and parking lots. Low tires put more strain on inner and outer tie rod end and idler and pitman arms and steering racks too.

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07navi said:

The expy, navi, and the f-100 share the same bolt pattern and offset. I found these chrome 20" Boss brand winter wheels off an older expy on craigslist a week before buying the navi for $60 total with centers andView attachment 34623 lug nuts.

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762mm said:

True. This is why I never turn my wheels when the truck is not moving, as the resistance of a static wheel destroys steering components ten-fold.

"Never", unless it's some sort of a situation where I absolutely need to... of course.


Aa for correct pressures, they should be printed on the door sticker. To be honest, I don't remember what mine says. I got by looks and experience, so my 35 PSI might indeed be kind of low for a heavier truck (I'm still used to what I'd put in my old Explorer, lol).

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