70 psi in tires

[JBakerFX4]

I know our trucks call for 65 (20" rim package), but what if we went 5 over to 70? that's the way my truck came from the dealer. I might try them at that setting and take a wear pattern vs the 65 pattern. The tires say 80 Max so... Figure if I can gain any MPG's it's worth the stiff ride.

[mrnecsteve]

(1)You should base you tire pressure on the door plate versus your load......my 07 was delivered 25 pounds under inflated from the dealer. 50 versus 75 lbs
(2) If you live somewhere that the roads are perfect ,you might see a gain. If not ,your energy losses will move to your shocks and suspension. If you are wrong about the road conditions,you will slip belts on your tires,wear out your ball joints in record time and probably loose road contact at the worst possible time.

[dereku]

If you want a nice smooth ride, use the psi that the manual or door plate reccomends, if you want maximum tire wear use the tires suggested psi. Thats what tire manufactures do to get the proper psi. They look for the best wear.

[TANK'S 250]

you will gain MPG,...but your going to were out the centers of your tires quick.


You'll have to figure out if the gain in mileage will offset the cost of new tires.



Here's a page from my library.


TIRE AIR PRESSURE



A lot of people ask about tire pressure, if you've ever changed your tires from the EXACT stock ones,..IGNORE THE INFO ON YOUR DOOR!

each brand has it stamped on the side of the tire,..which is good,...but it's only a starting point.

Proper tire pressure will help fuel mileage,and tire wear.

As you can see in the pic below, if you have a certain type of uneven tire wear,..this is why.
.
.
.
.

.............Too little.............................too much......................................just right



Too little air pressure will also cause the tire to grind the plys internally, and possibly rupture.

The PROPER way to get the pressure right is...the tire chaulk test.

For a good explanation on how to do a chalk test...click the clink

Google Image Result for http://www.jeepfan.com/tech/TirePres...ureCutAway.jpg

[JBakerFX4]

I'll stick with the door jamb specs.

[KYStrokin]

i have nitto terra grapplers 275/75/20 and i run 72psi of nitrogen. My tires ride good and are wearing perfect

[2005F250]

JBakerFX4 you should just sell your PSD and get a prius.

[TurboSevenThree]

On my 16" rims w/ 285/75's I run 75psi cold, which makes for 80psi running. In the snow I'll run 65 or 70 in the rears. That's just me, but mine are wearing perfectly (and they're Firestones). And I've never looked at the door for that crap. The door don't know what tires I got on my rig does it, and there's no guarantee that's even the door it came off the line with since I'm not the first owner.

[JBakerFX4]

2005F250- Just trying to maximize what I have. I can think of better cars than a prius... that thing is gay. I rather have a Chopper bike or something. The mpg's on my truck aren't that bad now... but was just wondering what folks ran their tires at.

[TurboSevenThree]

Originally Posted by JBakerFX4

2005F250- Just trying to maximize what I have. I can think of better cars than a prius... that thing is gay. I rather have a Chopper bike or something. The mpg's on my truck aren't that bad now... but was just wondering what folks ran their tires at.

HAHA "Y'know what it sounds like when you drive by?" "No what's that?" "mmiiiiIIIIII'mgay..."