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  #1  
Old 08-15-2013, 04:03 PM
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Air Down For Sand Advice

The family and I have a planned vacation to a beach area that has access for vehicles. I'm considering taking my smaller, portable compressor along to make it convenient to be able to air down for better sand performance and will appreciate advise from experienced folks on where you suggest I drop the pressure to for this purpose. I'm running the standard 20" tires on my Summit. Thanks in advance!
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Old 08-15-2013, 04:05 PM
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Re: Air Down For Sand Advice

I would guess that since these are not true offroad tires that about 15 psi would be a safe place to operate them at. Mind you I believe it is anything under 25 psi will throw a TPMS code.

Depending on how soft the sand is and how loaded the JGC is you may just want to stay at normal pressures
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Old 08-15-2013, 05:06 PM
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Re: Air Down For Sand Advice

Rule of thumb is half your normal pressure. On my 18's I drop to 17 psi. I think that with the short sidewalls on the 20's that would be too low.

What is your normal pressure?

I always carry a portable compressor, and even used to carry a bicycle pump. Fortunately, most beaches I've been on have air stations where you get on/off.

If you park close to the water and it is tidal, keep a eye on it.
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Old 08-15-2013, 08:12 PM
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Re: Air Down For Sand Advice

I normally run them at about 38 cold which is 40-41 hot. Maybe I'll try dropping down just to 30 or below and only go lower if I need to. With four people in the car, I don't want to smoosh the sidewalls too much! I doubt this will be difficult sand anyway nor would I go someplace complicated.

Bill, this will be down on the barrier island near Wilmington NC. It would really be nice if there were air stations! (But I do have a small compressor I keep for portable home improvement work, so I'll probably bring it along with a hose and the "business end" just in case)
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Old 08-15-2013, 08:33 PM
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Re: Air Down For Sand Advice

You definitely need to air down, if you are running stock forterras you will be fine at 18-20 psi , I would not go any lower than that. Stay in the ruts and no sudden stops or accelating or sharp turns. Enjoy!
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Old 08-15-2013, 08:46 PM
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Re: Air Down For Sand Advice

[QUOTE=

Bill, this will be down on the barrier island near Wilmington NC. It would really be nice if there were air stations! (But I do have a small compressor I keep for portable home improvement work, so I'll probably bring it along with a hose and the "business end" just in case)[/QUOTE]

I don't like the idea of the 20's in any kind of off road situation. That being said, for sand driving you want the tires to flaten out to give a lager surface area. If its not power you will be ok, however you will put more strain on your trans. Slow and steady wins the race.

Don't try and use the on board inverter for a 110v compessor, you will blow the fuse. As far as air stations bring your own hose with quick disconects here in NY you need to supply the hose.
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Old 08-16-2013, 05:50 AM
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Re: Air Down For Sand Advice

I take my GC on the beach all the time. We have some really dry soft sand here at times.
I always air down to 20psi (I have 20 inch rims too).
I have found that the jeep performs really well at 20psi, plus with the 20inch rims I am not really game to go any lower and risk slipping a tyre off the rim.
At 20psi I have also driven on the bitumen for 30 or 40km after getting off the beach - just take it easy around the corners and it's fine...
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Old 08-16-2013, 08:47 AM
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Re: Air Down For Sand Advice

Quote:
Originally Posted by Brett View Post
I take my GC on the beach all the time. We have some really dry soft sand here at times.
I always air down to 20psi (I have 20 inch rims too).
I have found that the jeep performs really well at 20psi, plus with the 20inch rims I am not really game to go any lower and risk slipping a tyre off the rim.
At 20psi I have also driven on the bitumen for 30 or 40km after getting off the beach - just take it easy around the corners and it's fine...
+1 on 20PSI
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Old 08-16-2013, 10:04 AM
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Re: Air Down For Sand Advice

20 psi it is! Thanks for the advise, folks.
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