Fraser, Sand, Trailer, PSI, Speed

Submitted: Thursday, Dec 08, 2005 at 11:28
ThreadID: 28700 Views:3621 Replies:8 FollowUps:6
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I know, I KNOW, it's all been said before.... but anyway.

Lads, what is the definitive number (PSI) I could run my trailer at while on Fraser?

Backstory: 2005 Patrol, 3.0TD Auto, Cooper ATR 275x70x17, lightly loaded.
Trailer: Adventure Camper, 1.2 tonnes fully loaded, 285x75x16 MickyT's MTX.

Now I want to set my trailer tyres (PSI) at Inskip point & leave them for the whole trip if possible. If I use something like 23 PSI I reckon that might get me through, but will it be too low for 80km/h along the beach?

I understand heat is the problem when driving fast with underinflated tyres. Does anyone have the definitive number on how low you can have your tyres for a given speed? Do the electronic tyre pressure gizmos that give you a readout in the cab also measure heat? If so someone with one of those setups could give us some real numbers. Anyway, I'm after recommendations.

The other item I want to know is... real low pressures for the super soft stuff ie 16 PSI are a problem for the front tyres as they can roll off the rim when turning. Would that mean it is not problem for the rear & trailer tyres? Assuming no high speed work.

Thanks,

Aaron.
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Reply By: flappa - Thursday, Dec 08, 2005 at 11:45

Thursday, Dec 08, 2005 at 11:45
There is no definitive answer. To many different variables.

It has always been a guesstimate. Sure an educated guess , but a guess none the less.

I have always dropped my tyres on the vehicle to approx 25 psi , and drop my CT tyres to about 28 psi. My CT wouldn't be as heavy as yours I'm sure.

A lot of people just deflate the CT tyres to the same as their Vehicle tyres , roughly 20-25 psi. Leaves room to come down further in need.

16psi, It "shouldn't" bother the CT or rear tyres , but, its not impossible. They can catch on a deep wheel rut , and roll off etc.

It is far more likely to happen on the front the rears etc , but as I said , certainly not impossible.
AnswerID: 142958

Reply By: Redeye - Thursday, Dec 08, 2005 at 12:20

Thursday, Dec 08, 2005 at 12:20
Have a GU and Aussie Swag. Run all at 22Lbs without problems on the island.

Redeye
AnswerID: 142965

Follow Up By: Fusion - Thursday, Dec 08, 2005 at 12:53

Thursday, Dec 08, 2005 at 12:53
Hi Redeye,

I take it you drop down to 22 PSI all round and leave it there the whole time on the island?

Thanks,

Aaron.
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FollowupID: 396458

Reply By: Redeye - Thursday, Dec 08, 2005 at 12:56

Thursday, Dec 08, 2005 at 12:56
Yes Aaron I use 22 all the time,

22 was chosen at random. Been there a few times and never had to go lower (yet).

Redeye
AnswerID: 142974

Reply By: Fusion - Thursday, Dec 08, 2005 at 13:08

Thursday, Dec 08, 2005 at 13:08
Regarding the low tyre pressures and heat, I imagine there isn't enough beach on Fraser to get the tyres real hot at 80km/h?

If you were to go from the barge to Waddy point at 80km/h it would only take 1.5hrs or so wouldn't it? Plus I believe you have to slow down now in some zones, and there's the areas with washouts that cause you to slow down.

That being the case (and I'm after some comments here for or against) the only other downside of running around 22 PSI constantly would be increased fuel consumption when driving on the hard beach.

Comments.... anyone...

Thanks,

Aaron.
AnswerID: 142977

Reply By: glenno(qld) - Thursday, Dec 08, 2005 at 13:12

Thursday, Dec 08, 2005 at 13:12
Run all your tyres at between 23lbs and 28 lbs .
Who says you have to drive at 80klms per hr .
AnswerID: 142978

Follow Up By: Fusion - Thursday, Dec 08, 2005 at 16:10

Thursday, Dec 08, 2005 at 16:10
Good point glenno,

I am travelling with 2 other vehicles though, and not having been with them before, I don't know what they'll be like. ie lead feet, easy going etc.

I plan to air down and stay down though. We'll see how we go.

Thanks,

Aaron.
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FollowupID: 396486

Follow Up By: govo - Thursday, Dec 08, 2005 at 22:36

Thursday, Dec 08, 2005 at 22:36
The cops glenno ...do over that and you'll be forking out a speeding fine..was over there 2 years ago and drove past 8 4wd's pulled over all getting booked....sure puts a damper on the trip.
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FollowupID: 396544

Follow Up By: govo - Thursday, Dec 08, 2005 at 22:38

Thursday, Dec 08, 2005 at 22:38
unlees you mean ...run at 60 km or 70 km..then l appoligize for the mis under standing
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FollowupID: 396546

Follow Up By: Nick R - Thursday, Dec 08, 2005 at 23:03

Thursday, Dec 08, 2005 at 23:03
If the information you get is correct the island has an 80 speed limit, and judging by the photos at the rainbow beach pub the police do patrol the island.
I ran a heavy trailer at about 20 psi abd my LC80 at somewhere around 16 i think, it went like a train, even in the soft stuff
NickR
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FollowupID: 396552

Follow Up By: glenno(qld) - Saturday, Dec 10, 2005 at 17:56

Saturday, Dec 10, 2005 at 17:56
I MEANT LESS THAN 80KM/HR . guys
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FollowupID: 396766

Reply By: Member- Rox (WA) - Thursday, Dec 08, 2005 at 19:16

Thursday, Dec 08, 2005 at 19:16
Fusion, I have run my trailer split rims/skinnys @15psi on hard gravel rds long distance & no heat build up in fact the rear 4WD wheels get warmer @ 40psi. Frazer Island, the only soft point I came across was @ the ferry, the rest of the beach was hard. Coming from WA & living on beaches 16 PSI is no problems 60-80kph you slow down for the corners & wont get bogged cause you have the flotation. Fuel consumption in my Diesel goes from 14l/100km to 19l/100km that's not a big difference to me when you are only likely to do 300kms max on the island.
AnswerID: 143011

Reply By: BigPop - Friday, Dec 09, 2005 at 00:00

Friday, Dec 09, 2005 at 00:00
G'day Fusion,
I go to Fraser every year for 3 weeks for the Toyota fishing comp. I have an 80 Series that is loaded ot the hilt including a fulkl length roofrack etc and run 18 psi in my BFG A/T's. I also tow a specifically built off road trailer that is also loaded to the hilt and has at least a tonne in it (if not more) and haven't let the tyres down on it as yet. I camp up at Orchid Beach and haven't had any probs at all getting thru any of the soft stuff on and off the barges, and also including Indian Head. Just keep your momentum in the soft stuff and you should be fine - the beaches are hard as the highway and you should find you won't have any probs - if the trailer does bog down when you are off the beach, just let its tyres down to at least 20 psi and all should be OK.
Most of the tracks off the beach are pretty good so you shouldn't have any real concerns of rolling tyres off the rim - In my experineces up there the only time I've found that this happens is to the ones that want to go like a bat out of hell and do all sorts of tricks in the sand and that's when they roll the bead. I have never rolled one on or off the beach (yet) but then I may drive a bit more sedately than the ones I have seen who have. :):):):)

Regards
BigPop
(I never get lost because everyone tells me where to go)
AnswerID: 143050

Reply By: hoyks - Saturday, Dec 10, 2005 at 18:15

Saturday, Dec 10, 2005 at 18:15
80k/h is the speed limit, there is nothing that says you have to do 80. How about poking along at 60.
So you might get overtaken, your on holidays and in no hurry.
AnswerID: 143252

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