OffRoad Air Pressure
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OffRoad Air Pressure - 6/18/2008 2:37:56 PM
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Monument Hummer
Posts: 14
Joined: 4/6/2008
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I want to start airing down when going off road. What is a safe PSI?
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RE: OffRoad Air Pressure - 6/18/2008 2:41:33 PM
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wfturner
Posts: 45
Joined: 8/17/2007
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quote:
ORIGINAL: Monument Hummer
I want to start airing down when going off road. What is a safe PSI?
I''ve gone down to 15 PSI on all fours for about three days and all seemed fine.
I have a compressor to bring them back up to 35 PSI when heading home on the highway
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RE: OffRoad Air Pressure - 6/18/2008 4:15:27 PM
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Desert Dan
Posts: 133
Joined: 3/6/2007
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The 2 adavantages to lowering air pressure are increased foot print and flex of tires (better traction and floatation)and improved ride especilally on washboard roads.
I usually run between 25-18 psi depending on the conditions. If you get stuck in sand you can let out even more air untill you get traction
What size tires are you running?
It sort of depends on the terrain and how long you will be off-road and how heavily loaded the truck is and if you have an air compressor. You can run on the hwy for short periods at low speeds with reduced air pressure
below 20-18psi the sidewalls are are a little more vulnerable in the rocks and the lower you go the more chance of teh tire comming of the bead if teh rim.
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Desert Dan
H3 2006 Adventure/Lux/5-spd/sunroof/rock rails/underbody skids/block heater/Defender Roof Rack
Jeep TJ Rubicon 2003
Gone-But Not Forgotten 4x4\'s
1994 Jeep YJ
Toyota 4x4 Truck(s)
1970 Jeep CJ-5
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RE: OffRoad Air Pressure - 6/18/2008 6:29:58 PM
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rhill20
Posts: 4549
Joined: 10/27/2007
From: Delaware, Ohio GO BUCKS!
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In the mud I run 18 PSI and get great traction. Don''t have a compressor yet so I head straight to the gas station for air afterwards.
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RE: OffRoad Air Pressure - 6/18/2008 6:32:49 PM
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3hummers
Posts: 11783
Joined: 9/23/2007
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I run down to about 18psi in sand up to about 25psi.
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2006 H1 Alpha wagon
2000 H1 Slantback
1997 H1 wagon
2008 H3 Alpha
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RE: OffRoad Air Pressure - 6/18/2008 8:17:13 PM
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rhill20
Posts: 4549
Joined: 10/27/2007
From: Delaware, Ohio GO BUCKS!
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yea, thanks for that advice 3hummers (who told me to run 18 PSI)
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RE: OffRoad Air Pressure - 6/18/2008 9:51:21 PM
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Steve #1
Posts: 411
Joined: 7/29/2007
From: TEXAS
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It depends on your tires, wheels, and vehicle. Honestly, 18 PSI is high even for the stock Good Years.
To find the ballpark "aired down" pressure you should run on your vehicle with your tires and wheels, measure the distance from the ground to the bottom of the rim. Let air out to reduce this distance by 25%. Check the pressure and this is your "aired down" pressure.
Now make adjustments based on your tires and the terrain. In sand you should be safe. If your tires have a weaker sidewall (your aired down pressure is above 10 PSI) you will want to run a higher PSI in rocky terrain to reduce the chance of sidewall puncture.
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RE: OffRoad Air Pressure - 6/19/2008 2:29:52 AM
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hummerabia
Posts: 15
Joined: 1/30/2007
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Its pretty much all sand where I am and usually run 15 front and 12psi rear on 285/75 BFG A/T''s. Works quite well but have popped a bead a few times up front but that was mostly down to driver error. On the graded unpaved roads and rough gravel tracks 20psi all round.
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RE: OffRoad Air Pressure - 6/19/2008 4:46:06 AM
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Trey124
Posts: 4611
Joined: 7/20/2006
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If your serious about off roading look into getting the PowerTank, I bought one and can atest that it is the best/fastest way to inflate your tires back up. 1 10lb. tank can fill all four tires on 5 Hummers. It doesn''t cost that much to fill up with CO2 and you can run air tools also.
I run my tires depending on conditions at 20psi, if you buy tires look for ones that have extra sidewall protection.
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Slate Blue ''07 H3 Owner, THCI member and Driving Academy Graduate For Off Road Use Only & ''08 Boulder Gray Metallic H3 Alpha for the street
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RE: OffRoad Air Pressure - 6/19/2008 5:10:27 AM
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Bennersj
Posts: 691
Joined: 2/11/2007
From: Bethlehem, PA
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I give a big thumbs up on Trey''s power tank
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RE: OffRoad Air Pressure - 6/19/2008 9:30:23 AM
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alrock
Posts: 1058
Joined: 5/12/2007
From: Scottsdale, AZ
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16-18 psi. I use Staun''s to deflate, one was accidentally set about 12 and I didn''t have any issues. I would like the power tank but I don''t like the $. The $60 compressor from Costco suits me just fine.
I''ve punctured one tire on a rock while aired down and one while not aired down (basically it was a gravel road) on a bush stump (maybe it was a shrubbery)
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RE: OffRoad Air Pressure - 6/19/2008 3:44:35 PM
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Trey124
Posts: 4611
Joined: 7/20/2006
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quote:
ORIGINAL: alrock
16-18 psi. I use Staun''''s to deflate, one was accidentally set about 12 and I didn''''t have any issues. I would like the power tank but I don''''t like the $. The $60 compressor from Costco suits me just fine.
I''''ve punctured one tire on a rock while aired down and one while not aired down (basically it was a gravel road) on a bush stump (maybe it was a shrubbery)
The only knock on the compressor is the time it takes to fill up one tire. If your off road group all chip in and buy one it really is affordable. That''s not what I did and you think the guys that I go off road with would try to give me some moeny for the service that I provide but they don''t.
Just Kidding....seriously once you see one in action you''ll want one. I filled up four complete trucks by the time a compressor filled one tire.
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Slate Blue ''07 H3 Owner, THCI member and Driving Academy Graduate For Off Road Use Only & ''08 Boulder Gray Metallic H3 Alpha for the street
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