Best Tire Pressure

mrlacy2 · April 9, 2006

I have dealer installed Michelin LTX 265/75 10 ply. On my 05 2500HD Ex-cab 4x4 with 6.0 bought new 12/29/05. last one on the lot (yes got a great deal) Third new Chevy truck but first HD. Im not to familiar with the 10 plys. I would like to know the best pressure for these tires when my truck is unloaded. for the best prerformance and ride(for me and the truck) and longevity(for the tires)

Any help will be appreciated.

Trouttrooper · April 9, 2006

I have dealer installed Michelin LTX 265/75 10 ply. On my 05 2500HD Ex-cab 4x4 with 6.0 bought new 12/29/05. last one on the lot (yes got a great deal) Third new Chevy truck but first HD. Im not to familiar with the 10 plys. I would like to know the best pressure for these tires when my truck is unloaded. for the best prerformance and ride(for me and the truck) and longevity(for the tires)

Any help will be appreciated.

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I run around 50 on the rear and 55 on front. Works fine for me. You could probably drop it a little more, but I keep mine there for the frequent "medium" weight loads I haul and don't want to screw around with tire pressure all the time.

You should only run at 75-80 when you're hauling extremely heavy loads.

Roofer · April 9, 2006

I run about 50 when unloaded and can still pull a small trailer without airing up. I have a small leak from a nail hole in one tire. I have had it down to just above 20 psi unloaded before the 10 plys started showing. I would keep them above 40 though and it should ride just fine.

dewfpo · April 9, 2006

I run 50 up front and 45 at the rear when not towing or hauling heavy loads. When I picked the truck up from the dealer when new it had 80 f/r. Rode like it was on wooden tires. That didn't last long.

DEWFPO

Shaners · April 9, 2006

Those are all great answers!!!

I agree that about 5 lbs less in the rear than the front is about right... You'll just have to expirement to find what is right for you.

A good starting point is the 45-50 psi range.

Bart2500HD · April 10, 2006

Remember to adjust pressures when you rotate the tires too. I run about 50 in front and 45 in back.

mrlacy2 · April 11, 2006

Thanks for the input, the tire shop had 55 front 60 rear and it road pretty good, but I had my first oil change at 3000 and the guy that does the oil changes at the dealership changed the tire press to 48F 58R(with my gauge) and my truck developed a nice little bounce above 40mph and the pass. side seat would shake, It was very annoying! So before I had any response Sat. I changed press. to 60F 70R and its ok but a little rough.but with no bounce or shake. I think I will try the 55F/50R looks like most of you just run 5lbs. more in the front and are satisfied. So thanks again for your input , But dont let this stop anyone else from responding to this question Ill still check back in on this subjuct for awhile as I continue to play with the tire pressure.

Thanks Rob

steelman82 · April 11, 2006

Thanks for the input, the tire shop had 55 front 60 rear and it road pretty good, but I had my first oil change at 3000 and the guy that does the oil changes at the dealership changed the tire press to 48F 58R(with my gauge) and my truck developed a nice little bounce above 40mph and the pass. side seat would shake, It was very annoying! So before I had any response Sat. I changed press. to 60F 70R and its ok but a little rough.but with no bounce or shake. I think I will try the 55F/50R looks like most of you just run 5lbs. more in the front and are satisfied. So thanks again for your input , But dont let this stop anyone else from responding to this question Ill still check back in on this subjuct for awhile as I continue to play with the tire pressure.

Thanks Rob

<{POST_SNAPBACK}>

Good info to have. I finally bought new shoes for my ride after the OEM pizza cutters finally went bald. Got 265/75/16-E's & was wondering where to run the pressure. I understand you should step it up a few #'s when going with bigger tires. Anybody heard of that?

SandShots · April 13, 2006

i run 50 all the way around and does fine when i pull

my trailer with 2 atv's.

smujd · April 13, 2006

Please excuse my ignorance--very much still learning: why lower psi for the rear tires?

Thanks,

Bill

Draenor · April 13, 2006

Please excuse my ignorance--very much still learning: why lower psi for the rear tires?

Thanks,

Bill

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Unless you have any weight in the bed or towing, the rear is lighter than the front. The extra PSI up front is for the weight of the motor. If you keep the same in the rear you'll get a rough ride, hence the several PSI less in back.

dewfpo · April 13, 2006

Please excuse my ignorance--very much still learning: why lower psi for the rear tires?

Thanks,

Bill

<{POST_SNAPBACK}>

Unless you have any weight in the bed or towing, the rear is lighter than the front. The extra PSI up front is for the weight of the motor. If you keep the same in the rear you'll get a rough ride, hence the several PSI less in back.

<{POST_SNAPBACK}>

Exactly what Draenor said, plus.... your trying to keep the rolling diameter of the front tires the same as those of the rear in case you have and use 4wd. The extra weight over the front tires will make them squat more making their rolling diameter smaller then the rears, hence the extra psi in the fronts. If you have a 2wd, then this issue doesn't apply.

DEWFPO

Roofer · April 13, 2006

The other reason is for tire wear. With high pressure and little load, the tires will wear in the center, especially with 265's or bigger on stock rims. Lower pressure with little weight will flatten the foot print of the tire, making it wear more evenly.

smujd · April 13, 2006

Thanks, guys!

Bill

FlaMan · April 16, 2006

One of my best friends owns a tire store and he keeps mine at 55 all around and 70 in the rear when I tow my 8K pound 5th wheel. Tires are wearing well and the truck rides great. My truck weighs 6,600 #s empty as I weighed it on the truck scales recently.