Tyre Pressures Again

Dont even contemplate what you run on the road... The footprint length and width is what gets you through sand....
20psi is a starting point for sand driving...
Some soft sand dictates 10psi to your tyres...

Wow and i thought it simple. Never thought of doing anything but keeping all four corners the same whilst on sand.(may be a can of worms) Like the Duke says 20 is a starting point.(I prefer about 14psi)

Al
Personally I lower my tyres to the same pressures fore and aft, but not the trailer tyres (if I am towing in sand)
It seems to work with my setup, I lower to 18psi and leave the trailer at 40psi... the theory here is that the trailer wheels run in the "tracks" of the Patrol and the tryes have already created a hard track for the trailer tyres to run in.
I have watched others drive straight onto sand without lowering pressures and have no problems at all.... but personally I prefer to run the tyres deflated to 18....

Hope this helps although I probably have confused you more.... I know I've got ME confused............. LOL

yep My old girl had heaps of weight in the back and went as flat at 20psi as most peoples 12psi so for soft sand I would run 15 - 20 rear and 12 front. 12 psi rear was only for getting out of bogs and looked quite flat

Al
I've been beach driving in both 2WD (rear wheel drive) and 4WD for 25 years or so and have experimented with all sorts of set ups. Tyre pressures, tyre widths, weight distribution and heaps more.
I've found that, in the sand, the rear tyres do most of the work. (Try driving a FWD in soft stuff and you'll see what I mean)
Generally, the lower the rear tyre pressures the more flotation you'll get, particularly up sand hills etc. and less digging in.
It's a trade-off between traction and flotation. More traction will mean more digging in (and more chewing up the tracks).
I generally run 18-20 psi in all four (even with a heavy load) and leave the trailer (when I use one) at 35 or whatever.
But I have been down to under 10PSI in extremely deep, soft, dry sand. (not a good thing to do continually)
Experiment for yourself, it's pretty easy to let a bit more air out if you find the rear digging in.
Oskar

DiesAl,
I agree with the above except for the trailer, experimentation for the vehicle as mentioned, my Rangie on alloy rims I rarely go below 15 psi if I go lower I try to stick to straight lines if possible, I find the tyres roll off very easily on the alloy rims I've had no end of problems. Steel rims on my GU down to 10 psi no problems in real soft boggy stuff usually min out at 15 psi fully loaded to be on the safe side. The trailer I've had as low as 6 psi it's made the job of towing much easier, the trailer runs a lot smoother and doesn't jump around much. It works for me so I do it, I've never rolled a tyre and the engine strain seems to be less. My opinions as usual.

Al, I run 20psi all four tyres & never had a problem at Fraser, even going thru the soft parts at Nagalla Rocks......cheers....Con

Agree with most - we run on Fraser 80 series Diesel, towing 18ft boat - Down to 25 rears and 22 fronts and trailer to 28 at barge when fully loaded (be careful on the good sand they can get a bit hot especially when going as far north as say Orchard 120km's away). When we get to the blow at Indian, let fronts down to 14, rears 16 if it is soft, 18 if ok and do not touch boat trailer again. Have had to go as low as 12 all round when really soft. Pump all back up to 20 for the rest of the trip when unladen - never been stuck and can eat Nkgala.

Thanks All, off to Fraser in a couple of weeks so I'll start experimenting but it's looks like the "I's" have it, all four corners the same pressure.

Thanks Again