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Discussion Starter #1
Door jam says front tires 45/rears 80 psi. Sidewalls of my Bridgestones say max. 50 psi. My replacement tires are same size as factory specs., so which do you go by?

Roger
 

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RE: Tire Presure?

You sure your not reading that wrong?

Thats real high.

I know when I used the Burb to pick up baged shavings, I would run 60 psi.

But then I had 30 bags of shavings in it, not sure of the weight, but the tires looked flat so I would put 60 or so in and they looked right.
 

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Discussion Starter #3
I double checked and label puts cold psi at 45/80 front/rear. The 45 psi seems reasonable for the front, but I can't imange ever running rears at 80 psi.

Do you run all your tires at the same psi for everyday driving? Do you increase rear pressure when they are under load? I'm really just trying to determine the best combo for these 2 different driving condidtions so I can get best handling and fuel economy.

Thanks,
Roger
 

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I run about whate the label says for every day driving, but that does seem a little high.

On the other hand are the tires you got rated LT (light truck)?

I still think that is high for the rear pressure.

I'm going out and see if mine is readable right now.
 

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Just looked the label is all washed out.

I looked in the owners manual and it just says never inflate over the recomended pressure on the tires.

But then on the next page it also says.

If you have 16 inch tires on your vehicle, and


You'll be driving for very long at speeds of 66 mph to 75 mph where legal, inflate tires to 10 psi more than recomended cold inflation

Sounds funny to me but then who knows, maybe someone else here knows more.
 

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Discussion Starter #6
Yeah, my Bridgestones are LTs. I guess its best to stay within the PSI on the tires no matter what the label on the door jam says? :? Anyway, I'm still curious what PSI others have found to be the best for everyday driving and towing.
 

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My 94 2500 has 40 psi front and 50 psi back for up to 8 persons and 200 lbs. Above that the recommended pressure is 80 psi front and back. If your tires are not rated for 80psi then most likely you don't have the 10 ply Loadrange E rated tires. I assume your 'burb is rated 8600 lbs maximum weight. Those normally have E rated tires. The loadrange is imprinted on the sidewall of the tire. I would in any case not put more pressure into the tire than the sidewall says.
 

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The 40/50 pressure is very nice for normal everyday driving. My 3/4 ton is more comfortable than my brother in law's 2 door tahoe. Any higher though and the ride gets really bumpy. For heavy towing the high inflation is better.
 

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Discussion Starter #9
My LTs are load rated "C". Currently have fronts at 45psi a & rears at 50psi. As I said earlier the max psi on the tires is 50. With the psi I'm running at now it feels like I have boulders for wheels (no load). I guess I'll drop the pressure all around a bit. Any suggestions?
 

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Hello, I'm new to the site so I'm coming into this a bit late... I had a 92 K2500 suburban that required 10ply tires. The door jam also recommended a similar tire pressure around 80 psi in the rear and lower in front. The key was getting 10 ply tires rated for the load and pressure. I recently sold that truck and got my 97 K1500, then put new 10 ply Firestone destination M/T tires on it. Now I don't know what to keep the pressure at. The door jam pressure is low (around 35 i believe), but that is for the recommended 6 ply tires. What should I keep the new 10 ply tires at?
 

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FYI we just picked up a closeout 2006 w/ 454 and 3.73:1. At outside temp in the 30's check tire pressure warning was on till tires warmed up. This led to pressure check with 40 found in fronts and 70 in rears. Tires are Bridgestones with max. of 80 psi, so I took burb to truck stop to put in the 80. Later that day I found the label in the drivers door stating fronts should be 54 and rears 70.

I suspected the dealership had the lower pressures in tires to soften ride and sel more burbs. LOL!

I will say this....With max pressure in my previous tow vehicle, 2500 Ram w/ hemi puling a 29' toy hauler improved my gas milage by a little over 1 mpg, from 7.8 to 9. That was using 80 vs 40 psi.

I will probably follow the sticker suggested pressure when not towing and max when towing.

From reading posts here I will be lucky to get better than the 9mpg I had w/ the dodge. I guess if you want to play with the big boys and have big toys there is a price to pay.
 

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if your reading the sticker correctly, then i think you don't have the right set of tires that came with the truck from the factory. your should still be ok, but just follow the tires recomended and load capacity specs.
btw i run 40 50 too.
and when i used to work at honda, we had a tsb, about those pasports, it says to run the tire prs at 30 or lower. cause they ride so rought. LOL
 

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brownbomb said:
I double checked and label puts cold psi at 45/80 front/rear. The 45 psi seems reasonable for the front, but I can't imange ever running rears at 80 psi.

Do you run all your tires at the same psi for everyday driving? Do you increase rear pressure when they are under load? I'm really just trying to determine the best combo for these 2 different driving condidtions so I can get best handling and fuel economy.

Thanks,
Roger
On the street, I run my tires at 45 on the front and 60 at the rear. Offroad in sand I will air down to 25 front and 35 rear. It's a pain in the butt to air back up when I get back to pavement, but it beats getting stuck.

On my work truck GM recommends 80/80. I run 70 front and 80 rear. Goodrich KO's are a great street/offroad tire.
 

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My father-in-law's 98 Burban with 454 calls for 45/80 front/rear. He has michelin AT tires on there with a max sidewall of 80psi. The highest I have ever run any tire is 85% max sidewall....so I wouldn't be comfortable telling him to run 80 back there. I do work on his truck most of the time to help him save money.
 
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