OffRoad Air Pressure (Full Version)

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OffRoad Air Pressure

  

Monument Hummer -> OffRoad Air Pressure (6/18/2008 2:37:56 PM)

I want to start airing down when going off road.  What is a safe PSI?

  
wfturner -> RE: OffRoad Air Pressure (6/18/2008 2:41:33 PM)


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

Desert Dan -> RE: OffRoad Air Pressure (6/18/2008 4:15:27 PM)

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.

rhill20 -> RE: OffRoad Air Pressure (6/18/2008 6:29:58 PM)

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.

3hummers -> RE: OffRoad Air Pressure (6/18/2008 6:32:49 PM)

I run down to about 18psi in sand up to about 25psi.

rhill20 -> RE: OffRoad Air Pressure (6/18/2008 8:17:13 PM)

yea, thanks for that advice 3hummers (who told me to run 18 PSI)

Steve #1 -> RE: OffRoad Air Pressure (6/18/2008 9:51:21 PM)

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.
 

hummerabia -> RE: OffRoad Air Pressure (6/19/2008 2:29:52 AM)

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.

Trey124 -> RE: OffRoad Air Pressure (6/19/2008 4:46:06 AM)

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.

Bennersj -> RE: OffRoad Air Pressure (6/19/2008 5:10:27 AM)

I give a big thumbs up on Trey''s power tank[sm=goodidea.gif]

alrock -> RE: OffRoad Air Pressure (6/19/2008 9:30:23 AM)

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)

Trey124 -> RE: OffRoad Air Pressure (6/19/2008 3:44:35 PM)

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.

SteveO -> RE: OffRoad Air Pressure (6/19/2008 4:09:23 PM)

This seems to be the cheapest and works ok too...About 2 min. a tire.Tsunami Master Flow "1050" $59.00 at Pep Boy''s. Of course if you don''t have the time you will pay more!

[image]local://upfiles/2570/25EA3FE542734B0D9DE3BF645726E0A6.jpg[/image]

KS Trekker -> RE: OffRoad Air Pressure (6/19/2008 6:52:06 PM)

quote:

ORIGINAL: Bennersj

I give a big thumbs up on Trey''''s power tank[sm=goodidea.gif]


Even though it''s expensive, I''m begining to think it might be worth it. I''ve got the Master Flow portable air compressor, but this can be slow and you get a lot of moisture in the tire. Especially here in the Midwest or the South where it''s really humid. The moisture really plays tricks with the TPMS.

3hummers -> RE: OffRoad Air Pressure (6/19/2008 8:07:14 PM)

The problem with running tires pressure below about 16psi is that your risk of popping a bead goes way up unless you have beadlocks. You can run the lower pressures but I have seen a lot of people drive out of their tires.

  

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