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Thread: SLS MASKS A FLAT TYRE!

  1. 6th August 2012, 04:07 PM #1
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    SLS MASKS A FLAT TYRE!

    Coming back from Busselton here in WA on Saturday from a weeks free holiday courtesy of MIX 94.5's Winter Staycation competition, but that's another story

    Cruising up the Forrest Hwy / Kwinana Fwy on the last leg home, when all of a sudden the LH rear tyre let go totally at 110kmh!

    After briefly heading across two lanes of traffic towards the inner guardrails without my consent, got Bonnie under control and pulled off the side onto emergency strip.
    First thoughts were an axle had let go from the bang and the sudden veering off.
    No indication of a flat as I'm suspecting being dead straight road and the fact that the SLS was compensating for the slowly deflating tyre an re levelling everything.
    Anyway, following pics will tell the rest of the story.














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  2. 6th August 2012, 04:37 PM #2
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    Yep, happened to me too, but without your drama.
    SLS masks the lean and I think ACE hides the sway.
    Not sure if its a good thing or not??
    Terry
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  3. 6th August 2012, 04:58 PM #3
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    no trailer?

    I would think by the loud bang there must have still been lots of air in there,,,
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  4. 6th August 2012, 05:10 PM #4
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    A couple of tyre plugs should fix that!

    On a serious note I always run my tyredog on my rear tyres when going away, if I am towing I put the front sensors on the trailer, it has saved at least a couple of tyres for me.
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  5. 6th August 2012, 05:58 PM #5
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    Andrew You are so lucky you didnt roll. I had this happen to My rangie at xmas last year and almost rolled it. You have also done buggerall damage to the bodywork.
    Glad all is well now go and buy a lottery ticket..
    Brad
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  6. 6th August 2012, 06:02 PM #6
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    Lucky Andrew.buy a lotto ticket.
    Could have ended up much worse.
    Andrew
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  7. 6th August 2012, 06:18 PM #7
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    Funny thing is tread shows no sign of running out, it's all on the sidewall...

    Already got tickets!!


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  8. 6th August 2012, 07:29 PM #8
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    You also have a ready made swing for some lucky child
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  9. 7th August 2012, 07:19 PM #9
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    radial run flat

    This phenomenon is known as radial run flat.
    What happens is that the centrifugal force on the steel belt of the tyre from the rotation of the wheel at speeds over about 80km/hr makes the tyre feel like its fully inflated even as it slowly loses pressure.
    However the lack of air causes excess flex in the sidewall, heat build up, and eventually catastrophic failure of the tyre where the sidewalls meet the tread area - essentially the tyre all of a sudden goes BANG and separates into 3 pieces, which is what your pics show.
    I first read about this in a 4WD mag in the mid 90's, and a few weeks later my Dad had this happen on his 1974 renault (fortunately a rear tyre, I wouldn't like to think about it happening on the front)
    Cheers,
    Alex
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  10. 10th August 2012, 04:43 PM #10
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    Yep sounds about right, sidewalls were red hot to a point I had to wait to take it off as I couldnt keep my hands on it.
    Also explains why the tread doesn't even look remotely damaged or scuffed.

    The sidewalls on the Conti's are actually pretty flimsy to start with, think you can see how thin they are in the pics, only two canvas plies and no thicker than about 7or 8mm.


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