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Offline trippin

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tyre pressures
« on: July 27, 2012, 12:05:02 PM »
hey guys this may be a stupid question  ??? but being a new camper trailer owner just wanted to know if you are towing on a beach do you drop the pressures on the trailer to ?? if so what pressures would be recommended for a loaded camper cheers jamie
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Offline Bird

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Re: tyre pressures
« Reply #1 on: July 27, 2012, 12:26:32 PM »
It becomes trial and error really. There is no *you must* answer to it.

Go for a run down the beach, and see how much the tyres are digging in instead of floating on the sand, and let them down a bit from there.

What trailer?
How heavy?
What tyres and size and width
What sort of tow rig.

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Offline GeeTee

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Re: tyre pressures
« Reply #2 on: July 27, 2012, 12:29:50 PM »
Given the numbers of people who get bogged on beaches  each weekend it's NOT a stupid question!

Yep. I go to 8psi (approx 900kg trailer) on sand





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Offline 2010banditsa

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Re: tyre pressures
« Reply #3 on: July 27, 2012, 01:17:55 PM »
and whats the general consensus for rocky and rutted tracks?
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Offline dav

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tyre pressures
« Reply #4 on: July 27, 2012, 01:57:04 PM »
About 20psi. Or just make the tyre flatten out a bit.  The main thing it is flexible so the tyre moulds it self over sharp rocks the same goes for the 4x4. 
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Offline Owie

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tyre pressures
« Reply #5 on: July 27, 2012, 02:15:27 PM »
As stated, everyone's set up is different.
The terrain also varies, sand pressures will be different for desert sand, wet beach sand, dry beach sand.

For my set up; (this is a rough cold pressure guide)
Highway : 39.42.39. (front.rear.trailer)
Dirt road : 28.30.28
Dirt road with larger rocks : 23.25.23
Sand : could be (15.18.10), depends on sand type.
My trailer weighs about the same as my front axel weight, thus similar pressures.
Generally less than 10psi you want to be real careful, the side wall will be quite vulnerable and also the risk of bead damage on drive wheels.

Softer tyre pressure will provide better ride by absorbing the bounce and taking it off the suspension, but because the tyre flexes more and more contact with the ground, it will heat up if driven at the same rate. 

It is all a balance, best obtained by experience with your vehicle, camper and driving style.

Don't be afraid to air down (coupled with speed down) and try it.  If no good drop some more, or pump them up.
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Offline trippin

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Re: tyre pressures
« Reply #6 on: July 27, 2012, 02:19:39 PM »
ok thanks heaps guys i will dump some air out and trial and error cheers jamie
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Offline Jeepers Creepers

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Re: tyre pressures
« Reply #7 on: July 27, 2012, 02:41:07 PM »
I would've thought about 20 psi for the trailer.

But being new to this camper trailer thingy, i'm learning sumfin new everyday.
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Offline Nomad

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Re: tyre pressures
« Reply #8 on: July 27, 2012, 03:38:04 PM »
I generally drop them to 20 to 25 PSI....then if the sand gets soft you have a bit of room to air down with..............

Cheers
Nomad
« Last Edit: July 27, 2012, 07:51:18 PM by Nomad »
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Offline LJs GU

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Re: tyre pressures
« Reply #9 on: July 27, 2012, 03:40:37 PM »
Quote from: Owie on July 27, 2012, 02:15:27 PM
For my set up; (this is a rough cold pressure guide)
Highway : 39.42.39. (front.rear.trailer)

That high on the black top Owie?
LJ
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Offline dav

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tyre pressures
« Reply #10 on: July 27, 2012, 03:58:40 PM »
On the patrol I run 46psi all round and 40psi on the camper on tar. But as said when I hit the tracks you have to drop them to suit the conditions.
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Offline Teabag

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Re: tyre pressures
« Reply #11 on: July 27, 2012, 04:02:12 PM »
Quote from: LJs GQ on July 27, 2012, 03:40:37 PM
That high on the black top Owie?
LJ

I run 42 front and 44psi rear so seems reasonable to me. Can go to 36 if I'm looking for softer ride on blacktop....

Bush pressures vary depending on type of track etc.....Trailer does get dropped also, helps prevent punctures....
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Offline Hairs

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Re: tyre pressures
« Reply #12 on: July 27, 2012, 04:05:00 PM »
Quote from: LJs GQ on July 27, 2012, 03:40:37 PM
That high on the black top Owie?
LJ
Yeap, same here.
40-42-40 on the Black Top.
 ;D
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Offline Chippy76

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Re: tyre pressures
« Reply #13 on: July 27, 2012, 04:12:04 PM »
On soft sand I like to drop the 4wd tyres to 18 - 20 for the soft stuff.  A little bit of research at home will tell you what pressure to run on the CT to gain a similar size "footprint" as the 4wd  (currently trying to find a link to this)

Cheers Chippy :D
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Offline Swaggie

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Re: tyre pressures
« Reply #14 on: July 27, 2012, 07:02:30 PM »
Heah There

I have to agree with a few people here,get out and try it out for your vehicle...I was up north of Licola in Butcher Country and its clay/rocky shaley area...Its had a lot of rain up there and rained overnight constantly,i rum 31" MTZ's and areas are steep also,dropping in here and there to look for new areas...I found 16psi did the job nicely...

4psi rule..It might be scientifically right but i am not a fan of it...
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Offline ozbogwam

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tyre pressures
« Reply #15 on: July 27, 2012, 08:29:02 PM »
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.
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Offline Teabag

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Re: tyre pressures
« Reply #16 on: July 27, 2012, 08:36:12 PM »
Quote from: Swaggie on July 27, 2012, 07:02:30 PM
4psi rule..It might be scientifically right but i am not a fan of it...


I agree, biggest load of horse dung.....but hey, people roll with it....:-)
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Offline Eski

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Re: tyre pressures
« Reply #17 on: July 27, 2012, 08:54:15 PM »
I have cheated and now use a Tyre Pressure Monitor.

I have Light Truck tyres fitted..

On the Pathfinder I have found 36 PSI cold and after a long drive they level out at 40 psi.

So getting my 4 pound grow as everyone says.....   :cup:

So check cold and then check hot.  Then see how much they grow...
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Offline gacoxd

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tyre pressures
« Reply #18 on: July 27, 2012, 10:00:06 PM »
Quote from: Teabag on July 27, 2012, 08:36:12 PM

I agree, biggest load of horse dung.....but hey, people roll with it....:-)

OK. I'll bite.

Whats this 4psi Rule?

Damo
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Offline ozbogwam

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tyre pressures
« Reply #19 on: July 28, 2012, 08:52:10 AM »
Quote from: Teabag on July 27, 2012, 08:36:12 PM

I agree, biggest load of horse dung.....but hey, people roll with it....:-)

I disagree to a point, it's a good method to use a couple of times to get an idea of what is happening to your tyres at pressures and conditions. Don't do it every time but as I said a couple of times isn't a bad idea to ensure you aren't over heating your tyres for example. Better than the " make the sidewalks bag" method as its about increasing the length of your footprint not the width.
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Offline Teabag

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Re: tyre pressures
« Reply #20 on: July 28, 2012, 09:10:20 AM »
Quote from: ozbogwam on July 28, 2012, 08:52:10 AM
I disagree to a point, it's a good method to use a couple of times to get an idea of what is happening to your tyres at pressures and conditions. Don't do it every time but as I said a couple of times isn't a bad idea to ensure you aren't over heating your tyres for example. Better than the " make the sidewalks bag" method as its about increasing the length of your footprint not the width.

Fair enough, people will do what they do but I still think it is absolute rubbish, but hey, we are all entitled to our view.....
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Offline ozbogwam

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tyre pressures
« Reply #21 on: July 28, 2012, 09:16:34 AM »
No doubt, and I agree that doing it everytime you go out is a massive waste of time but first time out it is a good indicator if you are at correct pressures. From there on in you use those pressures as a starting point and go from there.
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Offline rodw

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Re: tyre pressures
« Reply #22 on: July 28, 2012, 01:09:19 PM »
Quote from: Teabag on July 28, 2012, 09:10:20 AM
Fair enough, people will do what they do but I still think it is absolute rubbish, but hey, we are all entitled to our view.....
Well there is another rule you could try. Keeping reducing pressure every time you venture off road until you roll a tyre off a rim and then go up 1 psi. Serious, some people use it but probably not ideal for touring duties!  ;D
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Offline Eamonn

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Re: tyre pressures
« Reply #23 on: July 28, 2012, 01:29:35 PM »
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....
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Offline trippin

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Re: tyre pressures
« Reply #24 on: July 28, 2012, 03:00:37 PM »
got a compressor so i will have a play with it and see how it goes ;-)
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