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Next: Oodnadatta via Dalhousie Springs to Alice Springs..
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External
Since: Jun 28, 2004
Posts: 307
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(Msg. 1) Posted: Wed Aug 27, 2003 4:29 pm
Post subject: Tyre pressures on unsealed (and sealed) roads?
Archived from groups: rec>travel>australia+nz (more info?)
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Last year we had some 'problems'/conflicting advice on tyre pressures
on unsealed roads. So I would like some information/feedback from the
group, so we will be better prepared this year.
We will again be driving a 4WD Toyota Landcruiser ('Troupie')
campervan (see MARK).
The instruction card which comes with the vehicle advises front+rear:
normally (i.e. sealed) 45psi, "off-road" 30psi.
One tyre-repair station (which fixed our flat tyre) advised
(front+rear) 35psi on unsealed roads.
The advice in the vehicles's manual (but that manual is for *all*
versions of the vehicle) is: normally (i.e. sealed), front 33psi, rear
57psi. I don't know if it gave numbers for unsealed roads.
The Lonely Planet Outback Australia guide advises 30-40psi on unsealed
roads as a sensible average.
After our flat tyre (which was probably just caused by wear/bad_quality
of the inner tube), we used 35psi on unsealed roads. Before the flat, we
used something like 40psi, IIRC, with the rear possibly higher.
What would you advise, in general, on unsealed roads which are not
heavy sand?
Given your advice, would we have to inflate the tyres again for sealed
roads, assuming that we don't go faster than 80km/h and mostly only
60-70km/h? If so, to which pressures?
Our priorities are minimizing the risk of a flat tyre and a smooth as
possible ride (in that order). Maximum speed is not an issue, because we
want to drive relatively slowly if possible, some 50km/h (or less if
needed). What I 'hate' are very stoney roads with such corrugations that
the vehicle shakes at every speed, except very slow (10km/h or so) or
very fast (70-80km/h or more). We had that from Innamincka to the Burke
and Wills Dig Tree, and it made us go back (way) before we reached the
tree. Other bad parts, but not as bad, were the stoney parts of the
Walkers Crossing Track.
Thanks in advance for any and all responses. |
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External
Since: Jun 28, 2004
Posts: 307
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(Msg. 2) Posted: Wed Aug 27, 2003 4:40 pm
Post subject: Re: Tyre pressures on unsealed (and sealed) roads? [Login to view extended thread Info.]
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External
Since: Aug 11, 2003
Posts: 11
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(Msg. 3) Posted: Thu Aug 28, 2003 5:57 am
Post subject: Re: Tyre pressures on unsealed (and sealed) roads? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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The only time I believe you should lower air pressure is when driving on
soft sand like is found on a beach. I drive on some of the softest sand on
the East coast of the US(The Outer Banks) and we all lower our tires down
to 18 to 25psi. Of course you don't drive 140kph or make sharp turns at
that pressure but it sure will make it easier on your vehicle while driving
on that type sand. Bull Dust is a perfect example. Just don't stop on top
of the Bull Dust because your vehicle will just sink more than if you kept
moving.
Paul
"Frank Slootweg" wrote in message
> Last year we had some 'problems'/conflicting advice on tyre pressures
> on unsealed roads. So I would like some information/feedback from the
> group, so we will be better prepared this year.
>
> We will again be driving a 4WD Toyota Landcruiser ('Troupie')
> campervan (see MARK).
>
> The instruction card which comes with the vehicle advises front+rear:
> normally (i.e. sealed) 45psi, "off-road" 30psi.
>
> One tyre-repair station (which fixed our flat tyre) advised
> (front+rear) 35psi on unsealed roads.
>
> The advice in the vehicles's manual (but that manual is for *all*
> versions of the vehicle) is: normally (i.e. sealed), front 33psi, rear
> 57psi. I don't know if it gave numbers for unsealed roads.
>
> The Lonely Planet Outback Australia guide advises 30-40psi on unsealed
> roads as a sensible average.
>
> After our flat tyre (which was probably just caused by wear/bad_quality
> of the inner tube), we used 35psi on unsealed roads. Before the flat, we
> used something like 40psi, IIRC, with the rear possibly higher.
>
> What would you advise, in general, on unsealed roads which are not
> heavy sand?
>
> Given your advice, would we have to inflate the tyres again for sealed
> roads, assuming that we don't go faster than 80km/h and mostly only
> 60-70km/h? If so, to which pressures?
>
> Our priorities are minimizing the risk of a flat tyre and a smooth as
> possible ride (in that order). Maximum speed is not an issue, because we
> want to drive relatively slowly if possible, some 50km/h (or less if
> needed). What I 'hate' are very stoney roads with such corrugations that
> the vehicle shakes at every speed, except very slow (10km/h or so) or
> very fast (70-80km/h or more). We had that from Innamincka to the Burke
> and Wills Dig Tree, and it made us go back (way) before we reached the
> tree. Other bad parts, but not as bad, were the stoney parts of the
> Walkers Crossing Track.
>
> Thanks in advance for any and all responses. >> Stay informed about: Tyre pressures on unsealed (and sealed) roads? |
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External
Since: Jun 25, 2003
Posts: 61
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(Msg. 4) Posted: Thu Aug 28, 2003 9:03 am
Post subject: Re: Tyre pressures on unsealed (and sealed) roads? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Frank Slootweg" wrote in message
> Last year we had some 'problems'/conflicting advice on tyre pressures
> on unsealed roads. So I would like some information/feedback from the
> group, so we will be better prepared this year.
>
> We will again be driving a 4WD Toyota Landcruiser ('Troupie')
> campervan (see MARK).
>
> The instruction card which comes with the vehicle advises front+rear:
> normally (i.e. sealed) 45psi, "off-road" 30psi.
>
> One tyre-repair station (which fixed our flat tyre) advised
> (front+rear) 35psi on unsealed roads.
>
> The advice in the vehicles's manual (but that manual is for *all*
> versions of the vehicle) is: normally (i.e. sealed), front 33psi, rear
> 57psi. I don't know if it gave numbers for unsealed roads.
>
> The Lonely Planet Outback Australia guide advises 30-40psi on unsealed
> roads as a sensible average.
>
> After our flat tyre (which was probably just caused by wear/bad_quality
> of the inner tube), we used 35psi on unsealed roads. Before the flat, we
> used something like 40psi, IIRC, with the rear possibly higher.
>
> What would you advise, in general, on unsealed roads which are not
> heavy sand?
>
> Given your advice, would we have to inflate the tyres again for sealed
> roads, assuming that we don't go faster than 80km/h and mostly only
> 60-70km/h? If so, to which pressures?
>
> Our priorities are minimizing the risk of a flat tyre and a smooth as
> possible ride (in that order). Maximum speed is not an issue, because we
> want to drive relatively slowly if possible, some 50km/h (or less if
> needed). What I 'hate' are very stoney roads with such corrugations that
> the vehicle shakes at every speed, except very slow (10km/h or so) or
> very fast (70-80km/h or more). We had that from Innamincka to the Burke
> and Wills Dig Tree, and it made us go back (way) before we reached the
> tree. Other bad parts, but not as bad, were the stoney parts of the
> Walkers Crossing Track.
>
> Thanks in advance for any and all responses.
There are probably as many "correct" tyre pressures as there are road
surfaces, tyre combinations and vehicle weights. I've always believed that
whatever the vehicle manufacturer specifies is the best if standard tyres
are fitted - they spend a lot of time and money testing tyre combinations,
but as a general rule;
Stony or rocky roads/tracks keep tyre pressures up so that the side walls of
the tyres do not get cut by the stones.
Muddy roads generally try to have tyre pressures on the high side so that
the tread throws the mud off.
Sandy roads - two opinions here. One is lower the tyre pressures to gain an
extra few square cms of surface area from the tyre. Or (IMHO) maintain usual
tyre pressures as the diameter of the tyre and the approach angle over the
surface is better.
If you want a few other opinions try aus.cars.offroad
Driving on corrugated roads is an art form - but as you found out driving at
70 to 80kph gave a smooth(er) ride. Driving slowly is hard on you and the
vehicle as you hit each bump, whereas driving faster means the wheels only
touch the top of each bump. >> Stay informed about: Tyre pressures on unsealed (and sealed) roads? |
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External
Since: Aug 14, 2003
Posts: 21
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(Msg. 5) Posted: Fri Aug 29, 2003 1:56 am
Post subject: Re: Tyre pressures on unsealed (and sealed) roads? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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From experience keep the pressure up on unsealed roads to avoid cutting
sidewalls on rocks.
If driving on sealed roads in HOT conditions(ie 45C+) lower slightly.
Frank, you mention inner tubes. Again from experience, if it is your
vehicle, start out with tubeless tyres, but take tubes to put in if/when
punctures occur.
Why? - because tubes in tyres on unsealed raods move a bit inside the tyre
and weak spots create puncture zones.
The lowest I have lowered pressure in sand is 10psi. Make sure you have a
RELIABLE pump to reinflate!
This is based on my experience of driving a fully laden Hilux around
Australia and up the Cape, Kimberly and everywhere in between.
Traveller
Frank Slootweg wrote in message
> Last year we had some 'problems'/conflicting advice on tyre pressures
> on unsealed roads. So I would like some information/feedback from the
> group, so we will be better prepared this year.
>
> We will again be driving a 4WD Toyota Landcruiser ('Troupie')
> campervan (see MARK).
>
> The instruction card which comes with the vehicle advises front+rear:
> normally (i.e. sealed) 45psi, "off-road" 30psi.
>
> One tyre-repair station (which fixed our flat tyre) advised
> (front+rear) 35psi on unsealed roads.
>
> The advice in the vehicles's manual (but that manual is for *all*
> versions of the vehicle) is: normally (i.e. sealed), front 33psi, rear
> 57psi. I don't know if it gave numbers for unsealed roads.
>
> The Lonely Planet Outback Australia guide advises 30-40psi on unsealed
> roads as a sensible average.
>
> After our flat tyre (which was probably just caused by wear/bad_quality
> of the inner tube), we used 35psi on unsealed roads. Before the flat, we
> used something like 40psi, IIRC, with the rear possibly higher.
>
> What would you advise, in general, on unsealed roads which are not
> heavy sand?
>
> Given your advice, would we have to inflate the tyres again for sealed
> roads, assuming that we don't go faster than 80km/h and mostly only
> 60-70km/h? If so, to which pressures?
>
> Our priorities are minimizing the risk of a flat tyre and a smooth as
> possible ride (in that order). Maximum speed is not an issue, because we
> want to drive relatively slowly if possible, some 50km/h (or less if
> needed). What I 'hate' are very stoney roads with such corrugations that
> the vehicle shakes at every speed, except very slow (10km/h or so) or
> very fast (70-80km/h or more). We had that from Innamincka to the Burke
> and Wills Dig Tree, and it made us go back (way) before we reached the
> tree. Other bad parts, but not as bad, were the stoney parts of the
> Walkers Crossing Track.
>
> Thanks in advance for any and all responses. >> Stay informed about: Tyre pressures on unsealed (and sealed) roads? |
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External
Since: Jul 06, 2003
Posts: 30
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(Msg. 6) Posted: Sat Aug 30, 2003 1:07 am
Post subject: Re: Tyre pressures on unsealed (and sealed) roads? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Wed, 27 Aug 2003 13:29:48 GMT, Frank Slootweg
wrote:
> Last year we had some 'problems'/conflicting advice on tyre pressures
>on unsealed roads. So I would like some information/feedback from the
>group, so we will be better prepared this year.
My own would be to accept that it can happen and learn how to
handle it. I was once way off the bitumen with three flats and only
two spares ....
But having said that, tyre construction has improved so much that
the risks are a lot less than they used to be.
______________________________________________________________
Keith Sayers, Canberra, Australia kmsayers DeleteThis @pcug.org.au
Mail : 6 Clambe Place,
CHARNWOOD, ACT 2615 <a rel="nofollow" style='text-decoration: none;' href="http://www.pcug.org.au/~kmsayers" target="_blank">http://www.pcug.org.au/~kmsayers</a>
-------------------------------------------------------------- >> Stay informed about: Tyre pressures on unsealed (and sealed) roads? |
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External
Since: Aug 30, 2003
Posts: 1
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(Msg. 7) Posted: Sat Aug 30, 2003 3:01 pm
Post subject: Re: Tyre pressures on unsealed (and sealed) roads? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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The most people will use pressure between 35 PSI and 40 PSI. Surly pressure
depend also on how heavy is vehicle, that is how many people .... What kind
tyres you have and how good they are. On the end is a feeling, how your
vehicle behave and how safe you feel. I was driving Land Cruiser in outback
usually 37 PSI, front and back. Sometimes I got out and inflate to 42 PSI
for sharp stones and rocky road and sometimes I deflate it down to 20 - 22
PSI for sand. Ones I was down to 9 PSI to get myself out from sandy beach.
If you wont to drive on sealed road fast, yes you should inflate your tyres
back to what is recommended, but always have in mind, that recommendations
are for could tyres. You can always come to roadhouse and inflate it there,
even if you drive first 70 or more km a little bit normal (80 - 90 km).
The most time you will get flat tyre from fast driving and not being able to
avoid roots, stones and other obstacles. Sure, things can always happened
even if you are to careful. Just do not worry!! >> Stay informed about: Tyre pressures on unsealed (and sealed) roads? |
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