H3 Alpha tire pressure

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H3 Alpha tire pressure

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H3 Alpha tire pressure - 7/7/2008 5:52:12 AM

mountainbyker

Posts: 5
Joined: 7/7/2008
Status: offline

Hi guys, I apologize if this has already been asked but I couldn''t figure out how to search the forums. I just bought an H3 Alpha, drove it for a couple weeks and checked the tire pressure. The tires state the max air is 44 which is what I put in but shortly after filling them I noticed a factory sticker on the door which said the correct pressure is 31 which is what they were filled to before I started fooling around. What is the correct pressure? It seems like 44 would be better for mpg but I don''t want to mess up the tires.

One more question - how do you search the forums??

Thanks!

Paul

Post #: 1

RE: H3 Alpha tire pressure - 7/7/2008 6:51:58 AM

HummerMike

Posts: 376
Joined: 8/8/2006
From: Crown Point, IN
Status: offline

Recommended tire pressure is on a sticker inside the drivers door jamb. That''s the pressure the dealer will set when you have service. I think it''s around 35psi depending on your tire size, 32 or 33". 44psi will probably set the tpm system alert on the dash for overinflation.

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'08 H3 ALPHA w/Adventure Package. Graphite Metallic, Mickey Thompson Baja MTZ's, Rocker Panel & Driveline Protection, Winch, more to come...

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(in reply to mountainbyker)

Post #: 2

RE: H3 Alpha tire pressure - 7/7/2008 8:06:34 AM

Doc Olds

Posts: 3811
Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
Status: offline

For the 33s the H3 door jamb sticker says 35psi. I run my H3 with the 33s at exactly 38psi cold for on road driving.

(in reply to HummerMike)

Post #: 3

RE: H3 Alpha tire pressure - 7/7/2008 8:16:29 PM

alrock

Posts: 1058
Joined: 5/12/2007
From: Scottsdale, AZ
Status: offline

I''m at 38 as well, a bit above the mfr. recommendation. Do not inflate them to the max PSI on the sidewall (not that you would, I''ve just seen it done before).

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(in reply to Doc Olds)

Post #: 4

RE: H3 Alpha tire pressure - 7/10/2008 8:10:15 PM

mountainbyker

Posts: 5
Joined: 7/7/2008
Status: offline

Thanks for the tip - why not inflate based on what''s on the tires? (I did!)

Thanks - Paul

(in reply to alrock)

Post #: 5

RE: H3 Alpha tire pressure - 7/10/2008 11:10:23 PM

hummech

Posts: 57
Joined: 4/29/2008
Status: offline

put the pressure from the drivers door sticker. i would explain why but every time i have tried on this forum it times me out. it has to do with the performance of the hummer and the tire ware.

(in reply to mountainbyker)

Post #: 6

RE: H3 Alpha tire pressure - 7/11/2008 8:37:46 PM

Midnight Blue

Posts: 23
Joined: 3/1/2008
Status: offline

I''m at 44psi trying to get some mileage out the H3....and don''t care about tire life...it''s a lease.

(in reply to hummech)

Post #: 7

RE: H3 Alpha tire pressure - 7/12/2008 7:21:14 AM

mountainbyker

Posts: 5
Joined: 7/7/2008
Status: offline

Can you tell if it makes a difference?