willald

NC

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Joined: 07/15/2002

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mowermech wrote: As for the differences in tire type requiring different pressures, sorry, I don't buy it.
I think in the case of the Excursion the E tires don't necessarily REQUIRE the higher pressure so much, but they ALLOW it, so you can improve things. You could run the lower pressure as recommended by the door sticker if you want, and there'd probably be no harm done.
However, a much better handling truck can be had from the Ex, if you air those E tires up a bit, to help compensate for those soft leaf springs Ford put on it. I as well as several others can tell you that from personal experience. As already said, even Ford must have agreed, since they went to all the trouble to do a recall as well as change to using E tires on this truck. Too bad they didn't change the door sticker, though.
Quote: The bottom line, of course, as in all such discussions, it is YOUR vehicle, YOUR tires, do it YOUR way. It is unlikely that any harm will result from whatever you decide.
Yep.
Will
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mecreature

Indianapolis, IN

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chadsalt wrote: mecreature wrote: You will need to run more pressure in your E rated tires as compared to the D's to get the same load capacity..
No you dont. If the same size tires, more air means more load....but they will hold the same load capacity up to their respective psi limits.
Where did you get the info for that quote? You seem quite confident in it.... just curious
I switched from a P rated tire to an E rated tire on my 1500.. Another story....
door tells me to run 32 front and 34 in back.. for the P rated tires... I assume that to be able to handle maximum load..
Michelin told me on my E rated tires for the weights listed on my door I should run 42 front and 45 in the rear according to their load charts..
I was looking for this information so I would have a bench mark on air pressures for an E rated tire since the only info on the door jam for P rated tires... and adjust accordingly for my load at my pleasure.
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LoudRam

New Jersey

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First off, nice choice in tires. I run the same tires, size and all. (LT265/75R16). I keep them inflated to 60psi all year round, loaded or unloaded. That seems to work beautifully. Never had any issues at all. My stock size is (P245/75R16). If I kept these Firestone's at the recommended 35psi they would look flat.
It's a great tire. I've had it in snow, thick mud, & dirt. They never let me down.
* This post was
edited 09/23/08 01:13pm by LoudRam *
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chadsalt

sc

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mecreature wrote:
Where did you get the info for that quote? You seem quite confident in it.... just curious
Any load/inflation chart will demonstrate that fact.
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92DakotaHD

Indiana

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The door sticker only applies to the factory tires or near direct replacements.
And why do some on here keep the rears aired up more than the front when empty or even when towing. With W/D it'll be a pretty close spread and the motor up front needs to be considered.
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mowermech

Billings, MT

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So, what pressure should I have in the tires on my Jeep Rubicon? Should I run the pressures shown on the tire placards, or should I be running the tire sidewall maximum pressure?
Keep in mind, now, that the Rubicon OEM tire, from the factory, is an MT/R Load Range E tire. Also keep in mind that it has custom bumpers, a winch, a tool box, handy-man jack, aftermarket skid plates, etc. It ain't light!
So, what tire pressure, the 33 PSI OEM recommendation, or the 80 PSI tire maximum? What is the MINIMUM I can run when aired down for off road?
Should I change the tire pressures when I take the soft top off and install the hard top?
Oh, and please justify your recommendations.
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Rubiranch

Salt Lake City, UT

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My tires are rated for 80 PSI max load and there is no sticker on the door. They are LT245-75R16 load range E.
Loaded towing I run 70 psi in the rear and 65 psi in the front. Watching the wear pattern this seems to work fine.
When empty I run 40 psi front and rear and it rides a lot nicer than it does with 70 psi.
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