Letting tyres pressures down

What about the cowboys that open the eski as soon as the dirt is met . Particularly on the recreation weekends up that tough section they have read about in a 4wd mag. Are you worried wether it is legal or not to air down in a public place ?.
Someone mentioned roof racks, good point, getting a bit off topic I know but , take in over weight , lifted ,modified etc I think there could be many reasons why your insurance could be void if the ship hit the fan.
Its all good fun until the first kid starts crying.

Hope this does not prove my stupidity, but what I have gleaned from many posts:
Let's assume bitumin is 32psi
Good dirt less 20%
Bad dirt/corrugations/ruts less another 20%
Soft sand another 20%
So that's 16 on sand, a reasonable rule of thumb for the non expert?
Plus
I bought a tyre dog to minimize the chances of ruining a tyre(my big fear when traveling alone) , what is reasonable temperature gain in the above scenarios.

Cheers

I would'nt argue with that. Good ROT. (Rule Of Thumb)

Others more experienced in sand will give you the finer details.:D

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Originally Posted by goingbush

Yeah, I'm guessing these guys didn't let their tyres down,
(at least they tarped up)

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Pity about the blokes in the back!

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Originally Posted by AndyG

Hope this does not prove my stupidity, but what I have gleaned from many posts:
Let's assume bitumin is 32psi
Good dirt less 20%
Bad dirt/corrugations/ruts less another 20%
Soft sand another 20%
So that's 16 on sand, a reasonable rule of thumb for the non expert?

Cheers

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16psi is way too low for normal sand driving. I would only go that low in an extreme situation. I've been regularly driving Fraser & Moreton Islands for nearly 40 years &:wheelchair: run on 20psi in the several vehicles I've used, most of which succumbed to corrosion, even the Defenders & Rangies:dbcry:
Another thing is that running my tyres at 36psi normally, to deflate to 20 takes 1 minute so that is how I deflate without having to check the pressure several times (I do check at the minute mark of course)

Weight, vehicle, type of tyre, driving style, terrain, engine power and knowledge are the determining factors in tyre pressure choice. There is no hard and fast rules these combining factors dictate. It something you have to learn with experience over time. Hence the difficulty in adding this into a couple of day training courses.

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Originally Posted by Saitch

16psi is way too low for normal sand driving. I would only go that low in an extreme situation. I've been regularly driving Fraser & Moreton Islands for nearly 40 years &:wheelchair: run on 20psi in the several vehicles I've used, most of which succumbed to corrosion, even the Defenders & Rangies:dbcry:
Another thing is that running my tyres at 36psi normally, to deflate to 20 takes 1 minute so that is how I deflate without having to check the pressure several times (I do check at the minute mark of course)

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Pretty much what I do......I have stauns set at 22 and 18. Generally 22 is fine for most beach work.

I have been on Morton for the last two weeks, started at 16 to get my camper across the island, than went up tk 28 as I was belting up and down the beach on hard sand, dropped back to 20 as we have been in the soft stuff the last few days. Back to 16 in the morning to two the camper home.

I don't think 16 is low for sand driving but it depends what sand your on.

We drove frazer some years back and never even dropped the pressure, however on Stockton beach we drive with 16 and actually had to drop to 14 to get us out if a specific situation

beach sand and desert red sand are different. I spent approx 650km in the simpson at 15psi

I regularly (if twice a year and 10,000kms are regular)drive the Strezleckie/OOdnadatta/Birdsville tracks at 25psi...fully loaded.

I also stop often....why?....whats the hurry?.....so much to stop and look at.....and I check the tyres.

I have never experienced anything like excess tyre heat , so maybe some of you guys are driving too fast.....something which I have observed out bush.

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Originally Posted by Saitch

16psi is way too low for normal sand driving. I would only go that low in an extreme situation. I've been regularly driving Fraser & Moreton Islands for nearly 40 years &:wheelchair: run on 20psi in the several vehicles I've used, most of which succumbed to corrosion, even the Defenders & Rangies:dbcry:
Another thing is that running my tyres at 36psi normally, to deflate to 20 takes 1 minute so that is how I deflate without having to check the pressure several times (I do check at the minute mark of course)

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The church has been hiding child molestation for well over 40 years, does not make it right though. nothing wrong with 16psi at all, ran down to 14 in the simpson, whilst others were getting stuck we were towing a camper across east to west no problems