I went to the beach next to the Pacific ocean and the hummer did great. I actually was able to drive, hook up other trucks and drive and pull them out.
The other vechicles included front wheel drive cars (don't ask) and a Blazer
The information about the air pressure is a good idea. The reason is that when you take out the air pressure the tire will be more flat on the sand and not dig into the sand. I put mine at 25 and was just fine even in heavy stuff. The H3 will beep at you and the warning light will come for low air, this is not anything wrong though. Just don't go to low. Do air them back up though before going on the roads especially if high speeds. For about $35.00 you can find a tank that is not to big. Fill it up before you go at a gas station and when you leave the sand dunes just pump them with that to 30 or 35. You can also, get the ones as mentioned that fit in the cigarette lighter, but they will take a long time and can over heat and turn off.
If you do use the cigarette one you should run the engine so you don't run your battery down. I think the H3 has protection built in so you can't but don't want to test that out in the middle of no where.
Where are you going to? Check out my pictures in Long Beach, WA.
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