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Thread: Off Road Tyre Pressures (was Kookynet...)

  1. #1
    p38arover's Avatar
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    Off Road Tyre Pressures (was Kookynet...)

    Quote Originally Posted by p38arover View Post
    [Miriam from Imintji Roadhouse told me] ...to drop my tyre pressures a bit before going onto the GRR to make them less susceptible to cuts from sharp rocks. It was also recommended I carry two spare tyres. I didn't have a second spare at the time but got one for my daughter before she went onto the road.

    I was told in Derby that a lot of Miriam's partner's business is fitting tyres to 4WDs. He buys second hand tyres in from Perth ready for the unwary traveller.

    Quote Originally Posted by Xtreme View Post
    Re tyre pressures on the Gibb (and similar) roads, the only times (twice) I have has failures is when I have lowered pressures. For some time now I have been running higher than standard pressures on these type of roads and since doing so have not had one failure. I still lower pressures when travelling slow rocky tracks where max traction is required.
    Interestingly, the Beadell's Tours site http://www.beadell.com.au/tyre_construction.htm
    (see thread http://www.aulro.com/afvb/showthread.php't=43652) suggests lowering pressures on steel belted radials


    The sidewalls are thin and supple, allowing little heat build-up at high speed thus reducing tyre wear. These same thin sidewalls can also be used as shock absorbers for Off-road. By letting your pressure down a few psi, the tyre will absorb many of the corrugations and potholes with ease. Most importantly it should reduce the risk of damage, as the tyre with less pressure will "give way" so an object won't damage it, (try popping a half flat party balloon).
    Ron
    Ron B.
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    Interesting comments and quotes Ron but from my experience I'll still be keeping the pressures up on fast rocky roads & tracks.

    Even on my recent double crossing of the Simpson we (a group of 12 Landys and a total of 72,000kms) encountered no damaged tyres. Only one tyre went flat and when reinflated, stayed up - probably a grain of sand had found its way under the valve and was dislodged when the tyre was reinflated.

    I believe that this was the result of good tyres (six of us were wearing BFG AT's and three were running BFG MT's with two sets of Coopers and one set of Nankangs) and adjusting pressures and speed to suit the varying conditions. At times we were down to 15psi on the sand and up to 45psi on the fast rocky roads.
    Roger


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    That makes it difficult for us less experienced drivers.

    I know you have a huge amount of experience, Roger, and I don't discount your advice. Equally Beadell's should have a lot of experience.

    Which way do people like me go? How do I advise my daughter who is even less experienced than I?

    Ron
    Last edited by p38arover; 24th September 2007 at 09:38 AM.
    Ron B.
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    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



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    Quote Originally Posted by p38arover View Post
    That makes it difficult for us less experienced drivers.

    I know you have a huge amount of experience, Roger, and I don't discount your advice. Equally Beadell's should have a lot of experience.

    Which way do people like me go? How do I advise my daughter who is even less experienced than I?

    Ron
    Get out on more club/AULRO group trips with the 'more experienced' members and build your experience.

    I might add that none of us are so experienced that we can't learn more and should always be open to listen to opinions and ideas from anyone.

    Remember, we were born with two ears and one mouth and should use them in that proportion!
    Last edited by p38arover; 24th September 2007 at 09:38 AM.
    Roger


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    p38arover's Avatar
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    Quote Originally Posted by Xtreme View Post
    Get out on more club/AULRO group trips .....
    That's unlikely to happen.

    I'm not renewing my membership of the LROC.

    I haven't been on a club trip in over 6-7 years and only 4WDing a few times since - twice with the AULRO and several times alone.

    Ron
    Ron B.
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    Quote Originally Posted by p38arover View Post
    That's unlikely to happen.

    I'm not renewing my membership of the LROC.

    I haven't been on a club trip in over 6-7 years and only 4WDing a few times since - twice with the AULRO and several times alone.

    Ron
    That's a pity Ron.

    You know, I was out only last week for a few days with a guy whose Disco hasn't seen much 4WDing and he commented to me yesterday how his vehicle was going a lot better since the trip. It just goes to show that Land Rovers love to get out into the bush and do what they were made for and they show their appreciation by running better than if kept in suburbia!
    Roger


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    p38arover's Avatar
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    My last club trip would have been a high country trip with you Roger - and then I was a passenger in Peter Roger's Defender.

    Ron
    Ron B.
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    2003 L322 Range Rover Vogue 4.4 V8 Auto
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    That was waaaaaaaaay back in 2001 Ron.
    It's time you got out 4WDing again and gave that P38a a taste of the bush!
    Roger


  9. #9
    TheLowRanger Guest
    From my personal experienceI would recommend dropping tyre pressures for roads like the Gibb. Not too much because of possible heat build up in the tyres sidewalls, but definitely a few psi. I have found that it helps with tyre wear and it definitely gives a smoother ride over corrugations. Just be mindful that if you drop your pressures by more than about 3-5 psi (depending on what pressures you are running to begin with) also drop your speed accordingly to avoid heat build up. Currently the Derby end of the GRR is pretty good and the corrugations aren't too bad. It is possible to still do 110km/h through some sections but I still stick around 80-90km/h due to lower tyre pressures and to give a better heads up for changing conditions. I am currently living in Derby and driving the GRR is a weekly occurrance, so I do have some experience, but each to their own.

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    Quote Originally Posted by p38arover View Post
    My last club trip would have been a high country trip with you Roger - and then I was a passenger in Peter Roger's Defender.

    Ron
    Ron why don't you go off road any more.

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