tire pressure check
 

last night i took the goodyears (stock tire) to 38 lbs. it was at 34 and the door jam sticker says 30 which seems too low wile driving.
comments please... tire says 44 max psi

Re: tire pressure check
 

Why? :confused:

Re: tire pressure check
 

look low and that bog down feeling when turning the rig. It has been my experience in the past that the sticker is for best ride/performance not really what the tire can handel for better mpg and performance???
or becase I'm psyco, you have aftermarket tires already don't you?

Re: tire pressure check
 

No, I have the Duelers. I run them at the rec. 35 PSI (cold).

But I'm more worried about even wear than getting an extra 1 mpg by bumping up the PSI.

Re: tire pressure check
 

you like the firestone/bridgestone tire? I had them on my Aztek and liked them. What you go 35s

Re: tire pressure check
 

lol you said "Aztek"...

Re: tire pressure check
 

X2
Mine are 35 all the time exept off road then it 18psi.
I inflated them (hot) at the beach to 35 but next morning they were 36.5.(aired down to 35 cold)
It drove very smooth on the 25 mile highway trip back from the beach,Im thinking of trying 36.5 on the trip down to georgia July 1st.:cool:

Re: tire pressure check
 

HERE is a good one. i paid 32k for it 5 years ago before I was in the car biz and got rippped. Found out what an idot I was after I started selling. It was a Aztek with leather all options including air compressor and heads up display.

when your done laughing go hug your hummer

Re: tire pressure check
 

No I still have the stock 33's. They do the job. But I plan to upgrade at some point.

Re: tire pressure check
 

i run mine between 35-40

Re: tire pressure check
 

i've run 35, 38, and 45. Right now I'm running 38, but 45 felt very nice on the road.

Re: tire pressure check
 

Tire pressure recommendations are set for not only ride, but fuel mileage, and safety; with safety always overriding the other two. The weight of the vehicle, type of vehicle, GVWR, etc., are used to determine not only the tire size, but the pressure they should be set at; when cold.
Too high of a pressure can cause the tire to be more susceptible to damage due to sharp objects, too low causes too much internal friction when driving on hot days or very long trips. The reason for the max pressure stamped on the tire is that the tire manufacturer knows sometimes the tire has to be inflated higher than the recommended pressure. (Autocrossers go to max for cornering, off-roading where the tire will be running on the outer edge, is a few examples.)
GM (or any other manufacturer) does not pull these recommendations out of a big hole, they put hundreds of thousands of miles on these tires during testing at Milford. Therefore, the recommended pressure is what the tires should be set at when the tires are cold.
The Goodyear Wranglers that are used on the H3 have softer sidewalls than the Bridgestones so they might appear to be low, but if the pressure is at 30 psi on a cold tire, than the pressure is correct.
But, they are your tires. Just remember, for every ten degrees of temperature increase, the tires gain one psi, this includes the temperature increase due to the heat generated when the tire is rolllng down the road.

Re: tire pressure check
 

a ran my 33's at 38 psi and i run my 35's at 38 psi , its all about that extra one half MPG :p :D but in the wild 18 psi :cool: gonna test 15psi and 10 psi this weekend at pismo .

Re: tire pressure check
 

Neo
With the 35's mounted on stock wheels do you get a contact patch the full width of the tread at 38psi??

Re: tire pressure check
 

yes they do crown a little to about half of outside luggs , but its all in the plan ;) it saves the sidwall luggs :cool: i need those for gettin traction on them big rocks !!! :D :D :D

Re: tire pressure check
 

it also rides more floaty and alot more bouncy :eek: :D i dont mind :D

Re: tire pressure check
 

many thanks, will check again but the 38 seems good for me. I understand the research factor too! so i take it you run at the recomended 30 cold fstop?

Re: tire pressure check
 

I have the off-road package, recommended pressure on the Bridgestones is 35 psi, and that is what I run at.

Re: tire pressure check
 

I just got a set of 35" cooper STT's and am running 30 psi and still have a pretty good crown....

Re: tire pressure check
 

how much were the coopers?