tyre pressures

[Swaggie]

OK. I'll bite.

Whats this 4psi Rule?

Damo

Ok Damo i'll bite and answer  ....Theres a bit of reading to it...Links below.

http://www.aawen4x4.com.au/index.php?option=com_content&view=article&id=1:4psi-rule&catid=2:current&Itemid=7

Goodluck 

[zed]

Has a lot to do with the sand, I can run all over Fraser Island with 28PSI in 4WD and 20 in trailer, however get onto Stockton for example 4wd goes down to 12-14PSI and trailer down to 10PSI. Have you got a compressor mate. If not may want to get one sorted that way you can play around not having to worry about over deflating. Pump up a bit and move on....

I agree, stockton is a lot softer in places than any beach i've driven on in se qld including fraser and moreton islands. I normally drop to 18psi in sand regardless and then lower if it gets softer

[JU5T1N]

Will depend on tyre size, vehicle/trailer weight. In my GU on 33s I'll run about 34 on road and about 18 or below offroad.

On my old Suzuki on 35s I'd run it at about 20 on road and about 8 offroad.

You soon get an idea of what works for you but you will be amazed at the difference dropping your pressure has when offroad.

My Suzuki was 25 on the black top and ranged from 1.5-8 rocks - sand (loved them bead locks)
Patrol = 42 on road & 12-18 off road
Jayco Swan OB = 42 road & 18 off road

Every drivers form is different when 4wding. Some go at obstacles and take corners faster then others requiring higher pressures. I find its a case of trial and error. Try a pressure and drive accordingly to it, feel what the car is doing. Also old or new and different tyre brands require different pressures. When I put new Boggers on my Suzuki I ran without the valves in on the first trip to get the sidewalls to start flexing as they were around 1"thick

[Tjupurula]

I run my tyres at a constant 36 front and 38 back, and I see so little "blacktop" that I do not even bother adjusting them when I do.  I find around here that lower pressures put the walls too close to the ground, and that is when tyre walls get cut.  Of course when on sand and the like the tyres go down a bit, but that is not often these days either.
Regards
Tjupurula

[Eski]

Cities are where people are too busy to live, out here, I haven't got the time to be busy.

I'll agree to that one....

[Tjupurula]

Cities are where people are too busy to live, out here, I haven't got the time to be busy.

I'll agree to that one....

That is just me boasting, as I live every day what most people are saving up for when they get a holiday.
Regards
Tjupurula

[gacoxd]

Ok Damo i'll bite and answer  ....Theres a bit of reading to it...Links below.

http://www.aawen4x4.com.au/index.php?option=com_content&view=article&id=1:4psi-rule&catid=2:current&Itemid=7

Goodluck 

Thanks Swaggie!

[Swaggie]

No worries bud

Now you can work out if its 4 u....

[JU5T1N]

That is just me boasting, as I live every day what most people are saving up for when they get a holiday.
Regards
Tjupurula

Living the dream

[Tjupurula]

Only during the dry season Justin, once it gets wet, then it is hard work, getting out of bogs almost daily, getting others out of regular bogs, and occasionally being rained in for m6 - 8 weeks without fresh supplies.  We always carry enough tinned stuff.
Actually, it is during the wet that I drop my tyres right down to the 20's, and that often avoids bogs.
Regards
Tjupurula

[Symon]

It depends so much on tyre type and size, and what vehicle you have that it is impossible to make any particular rule as to what pressures you should run.  I read the 4PSI rule, and I agree it is crap as well.

With my D40 Navara with 31" MT ATZ's I ran 40,42,40 (front, rear, trailer) on the blacktop and when I hit sand I would drop them to 30, 32, 30 and go anywhere.  Only once I had to drop them lower and that was only to about 24 PSI.

Now that I have my 79 which is a heavy bugger, with 33" MT ATZ's I run 46, 48, 40 on the blacktop and on sand I have to go down to 16, 18, 20 or I'll get bogged in the first 20m.

[JU5T1N]

Only during the dry season Justin, once it gets wet, then it is hard work, getting out of bogs almost daily, getting others out of regular bogs, and occasionally being rained in for m6 - 8 weeks without fresh supplies.  We always carry enough tinned stuff.
Actually, it is during the wet that I drop my tyres right down to the 20's, and that often avoids bogs.
Regards
Tjupurula

These for wet season tyres perhaps

[mandsmiddleton]

Yep, down to 18 - 20.

[SteveandViv]

Yeap, same here.
40-42-40 on the Black Top.

Same....

[SteveandViv]

Only during the dry season Justin, once it gets wet, then it is hard work, getting out of bogs almost daily, getting others out of regular bogs, and occasionally being rained in for m6 - 8 weeks without fresh supplies.  We always carry enough tinned stuff.
Actually, it is during the wet that I drop my tyres right down to the 20's, and that often avoids bogs.
Regards
Tjupurula

Let me know next time and I'll bake you a fresh pie and fly it out 

[Tjupurula]

These for wet season tyres perhaps

Okau Justin, time to tell me what cariety of tyres they are.  They look seriously like good mud tyres.
Regards
Tjupurula

[Hairs]

Okau Justin, time to tell me what cariety of tyres they are.  They look seriously like good mud tyres.
Regards
Tjupurula

Maybe he made them like this

[JU5T1N]

Okau Justin, time to tell me what cariety of tyres they are.  They look seriously like good mud tyres.
Regards
Tjupurula

there Super Swamper Boggers. I ran them on my comp truck. The grip in mud is unbelievable. Also side wall strengths way above any BF, Coopers or the likes. I never had a side wall blow out, and I used these for many seasons. They would be like comparing a car to a locked diff 4wd in the mud.

[JU5T1N]

Maybe he made them like this

these are Super Swamper also just a different tread pattern. The cut the treads to get more lugs, allows more tyre flex and more grip in rocks....a little extreme tho