Proper Tire Inflation?

[H1Hummer Owner]

I have an H1 with the 37" Goodyear GSA tires. What's the best tire inflation pressure to run to maximize tire wear and fueleconomy (I realize that's an oxymoron).

I'm currently running 35PSI, though the side of the tire says Max inflation is 60PSI.

I'm sure the answer is somewhere in the middle.

[H1Hummer Owner]

I have an H1 with the 37" Goodyear GSA tires. What's the best tire inflation pressure to run to maximize tire wear and fueleconomy (I realize that's an oxymoron).

I'm currently running 35PSI, though the side of the tire says Max inflation is 60PSI.

I'm sure the answer is somewhere in the middle.

[H1Hummer Owner]

I have an H1 with the 37" Goodyear GSA tires. What's the best tire inflation pressure to run to maximize tire wear and fueleconomy (I realize that's an oxymoron).

I'm currently running 35PSI, though the side of the tire says Max inflation is 60PSI.

I'm sure the answer is somewhere in the middle.

[ssgharkness020147]

35 psi is a good amount of pressure to run. 30 psi will give you a better ride, but wear on the tires more quickly (the tires you have are discontinued if you didnt already know). 40 psi will be a very harsh ride so I wouldent reccomend going that high. If you run your tire pressure to high you will wear the center sections of tread out more quickly so avoid running over 40 psi. At 35 psi you get a decent ride quality, good tire wear, and the best fuel economy that you can possibly get in a HUMMER.

[H1Hummer Owner]

Thanks for the reply. 35 it is then. All your answers made sense.

Did Goodyear replace that with another model? If not, what is an equivalent model that people are using?

Any particular reason Goodyear dropped it?

[ssgharkness020147]

The GSA is now only made for the 17 inch rims. If you want to be able to run the GSA you will have to buy the 17 inch rims (a very expensive choice). Here is a link to an article about the tires available for the HUMMER (this site also has TONS of great info about maintaning an H1).
http://www.amghummer.com/features/Tires/tires.htm

[H1Hummer Owner]

I have the 17 Inch Aluminum rims. I did go to the Goodyear site, and didn't see the GSA's..I'll look harder.

Thanks for the link.

[bmac]

Just looked at the Goodyear site. Just select the vehicle and model and the GSA's pop right up (at least they did for a '02 H1). $311 each, BTW.

[H1Hummer Owner]

Thanks for the info.

I put in 2001...and it gave me the 16.5 rims..even though I had the 17" aluminum.

I just used 2002, and it worked. I don't need tires...just planning ahead due to the $$$$

[hmcoleap]

FWIW, I ran my GSA's at 50psi on the road, and I thought the ride was still quite reasonable (not harsh.) I got about 50k miles out of my GSA's running at that pressure.

For anyone who needs a set of the discontinued GSA's in 16.5" size, I am selling some right now -- brand new, never mounted. Looking to get $499 per tire for a set of 4 or more. I have a couple of sets. Email me if interested.

[BigKofJustice]

An heavy H1 at or near GVW [heavy wagon loaded up or armored HMMWV] has the recommend PSI at 35 psi front 40 rear. If you are empty or driving a lighter model [ie. a soft top or have a stripped down wagon] the manual recommends 24 psi front 27 psi rear for unloaded trucks running OEM tires.

It's also on the AM General decal printed on the door jam on the driver side B-pillar.

That being said I run mine at around 30-35 psi. You can run 45 psi if you want, if you have your alignment dead on, you'll get slightly better mileage an tire wear in theory. But the ride will be harsher.