![]() ![]() I think my stock Dodge wheel has a 6.75" back spacing. The only thing stopping me is if they will fit having a 7" back spacing. You can build up the wheels to include MilSpec bead locks. They start out with 8 on 6.5" holes and will fit on a full size pick up. One other thing to consider is HumVee (MilSpec) wheels. If we lose a bead, a 1K pound ratchet strap or ignited WD40 will get us back on the rim. I have compressors and a 25 pound CO2 tank to get the tires back up, over and over again. ![]() 1st to New Years Day trip, touching all the boundary states and attempting to camp on every beach that will allow it, including So. Jeanie and I are planning a 16 week, around the U.S. You wouldn't want to drive to New York this way:ĭepending on your sand, your tires, your rims, your GVW/per axle loading, your self extraction ability, this is the basic high and low range of lowered pressure for my rig, which is similar in weight to your rig. This is the sidewall deflection at the 18/22 pound threshold. Yes I did this when I got tangled up with some sand in the Owens Valley, and pulling a trailer too. These wide high floatation E rated, 3750 # load rated tires can go lower than the little 305's on 7" rims can. On very soft blow sand or dunes, I take it down to the lowest threshold (without beadlocks) I think my set up will take: Here is a pic with this pressure: We drove the Mojave Road, 146 miles with this pressure: Rear on 375x55R16's on 12" wide rims (so called super singles) is 28 pounds. There is a bit but not too much sidewall flex. My average sandy road and tight sand running pressure is:įront on 305圆5R16's is 30 psi. A truck camper is just a lot heavier with more ground pressure per the psi in the tires. I'm a long time jeeper and have deflated tires for sand for decades. So, I have to 'feel' the circumstances as they come. This can change even on the same beach or dune. My rig is not a pop-up, but is about the same weight as my bro's Outfitter on a long bed. With as much weight as you're carrying, 15 psi is probably about the useful lower limit, but you'd be surprised what it'll get you out of!! For emergency situations, air down as low as you need to. Don't do donuts, or sudden really hard turns and you have nothing to worry about. I ran my old full size chevy on 33's at 8psi, and my jeep on 285's at 5psi and never had a problem. You're not going to roll a tire off the rim unless you're doing hard turns at speed, even at fairly low pressures. It's amazing what dropping pressure will do for mobility, and you can always air back up some when you're on firmer sand. If you drop into a soft spot, and it starts to spin, STOP and let some more air out. If the sand gets really soft and you're adding a lot of throttle to keep moving, drop a little more out until the truck isn't working so hard. With as much weight as you're carrying, I'd say start at 30. It's not quite the same sand or loading, but I've run 13 in a mostly empty GMC 2500 out at Silver Lake Sand Dunes in Michigan with no issues, and I flogged it pretty hardgood. ![]()
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