Deflating in the First World

[Wooky]

Absolute tyre pressure numbers are fairly meaningless as you really need to take the vehicle weight, tyre construction and tyre width into account.

A narrow tyre on a heavy vehicle ( think loaded landrover 130 on 235 width tyres) will run a lot higher pressure and still get tyre deformation than say the same vehicle on a 12.5" wide tyres.
A tyre with more side wall plys will need lower pressures to get deformation as well.

[Wooky]

I use the "brick test" to get an idea of tyre pressures (and tyre deformation) for a vehicle / tyre combinations that I don't know.
The pic below is from the test when I fitted the 31X10.5 remoulds to the SJ.
Vehicle is lightly loaded for a day outing

[Mad Manny]

I fully agree Wooky.
But these guys generally all had 33's or 35's mainly All Terrain Tyres - one guy had 32's.

So its similar tyres to what we run.

Conditions range from Moab Rock, to mud, sand & even snow.
The Canadians driving off road on snow didn't seem to deflate at all.

In one example (4WD 24/7) they specifically mention only dropping to 1.4KpA & then proceeded to wear their winches out at an incredible rate.

[Wooky]

It might be an Aussie thing with hard tyres.
Have you watched any of the In skip or Fraser Island video clips on youtube.....Chaos

https://www.youtube.com/channel/UCevp8t ... 3vl3Nnkn1g

[Mad Manny]

Inskip Point reminds us that it's not only Rugby the Australians are piss poor at...

[Wooky]

Inskip Point reminds us that it's not only Rugby the Australians are piss poor at...

[Mike Nel]

The less HP your vehicle has, the more you have to deflate

[BushWacker]

Depends on area of tread
in contact with the ground ...

[Johannes]

Well , at Korranna , I watched as the guys battled on that last steep hill. Quickly went back to deflate to .9 . It worked .

[Ricof4e]

I did a quick fishing trip to the Nambian Coast this weekend - deflated to 1.4bar all round with four adults and two toddlers on board. I did not get stuck once. And this is with standard HT tyres.

I do get nervous about deflating below 1 bar. A debeaded tyre is no fun.

[KurtG]

Do yourself a favour and watch the first 8min of this video:

https://youtu.be/jALDz8Y5UvI

2Psi = 0.14bar (no, not 1.4)

[grips]

2psi, dis nog blerrie hard

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[Leon]

Ja nee dink hy moet nog heelwat afblaas , ja ek werk saam met ausies en hulle dink hulle weet altyd als.

[Ricof4e]

Do yourself a favour and watch the first 8min of this video:

https://youtu.be/jALDz8Y5UvI

2Psi = 0.14bar (no, not 1.4)

The biggest reason that guy got stuck was because her drives on the beach the same way he wears his silly little hat. That moegoe would have gotten out with his initial tyre pressure had he reversed on his own partially compacted tracks for about 40-50m, gathered a little but more momentum and did not try to get to the harder soil with such a high angle from his initial line of travel.

He got stuck because he is a moegoe.

[grips]

Do yourself a favour and watch the first 8min of this video:

https://youtu.be/jALDz8Y5UvI

2Psi = 0.14bar (no, not 1.4)

The biggest reason that guy got stuck was because her drives on the beach the same way he wears his silly little hat. That moegoe would have gotten out with his initial tyre pressure had he reversed on his own partially compacted tracks for about 40-50m, gathered a little but more momentum and did not try to get to the harder soil with such a high angle from his initial line of travel.

He got stuck because he is a moegoe.

I agree. That were my first thoughts as well why not reverse.