Tyre wear.





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Thread: Tyre wear.

  1. #1
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    Default Tyre wear.

    What could cause tyre wear in the middle of the tyre?

    I have 265/70/16 . if viewed from the front it looks like the tyre is lower in the middle than the sides.

    I think the pressure was too high before I bought the Hilux.

    the information on the inside of the door panel suggests 2 bar unloaded. is this correct?

  2. #2
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    Default Re: Tyre wear.

    Wear on centre of tire is usually an indication of over inflation.
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    Default Re: Tyre wear.

    Quote Originally Posted by fred1234 View Post
    What could cause tyre wear in the middle of the tyre?

    I have 265/70/16 . if viewed from the front it looks like the tyre is lower in the middle than the sides.

    I think the pressure was too high before I bought the Hilux.

    the information on the inside of the door panel suggests 2 bar unloaded. is this correct?
    What tyre pressures were you running?
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    Default Re: Tyre wear.

    Quote Originally Posted by Blackie KB 300 View Post
    Wear on centre of tire is usually an indication of over inflation.
    True but I've seen the opposite as well. Under inflated tyre driven daily at high speed for a relative short distance.

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    Default Re: Tyre wear.

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    Default Re: Tyre wear.

    Quote Originally Posted by Woestynbrak View Post
    True but I've seen the opposite as well. Under inflated tyre driven daily at high speed for a relative short distance.
    Surely that should lead to worn shoulders on the tread?

  8. #7
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    Default Re: Tyre wear.

    My understanding is that an underinflated tyre driven at high speed will cause the tyre to warm up too much and behave like an overinflated tyre.
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  9. #8
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    Default Re: Tyre wear.

    Quote Originally Posted by albertvl View Post
    My understanding is that an underinflated tyre driven at high speed will cause the tyre to warm up too much and behave like an overinflated tyre.
    What will happen to an overinflated tyre then?
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    Default Re: Tyre wear.

    Quote Originally Posted by Rebel 4x4 View Post
    What will happen to an overinflated tyre then?
    As far as I know it is safer to drive with an overinflated tyre than an underinflated tyre at high speed.
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  11. #10
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    Default Re: Tyre wear.

    Quote Originally Posted by albertvl View Post
    As far as I know it is safer to drive with an overinflated tyre than an underinflated tyre at high speed.
    True that. In fact, if you look carefully at some vehicle tyre pressure charts, it officially states a much higher pressure for sustained high speeds, above 160kph, although this doesn't really apply to South African cars as said high speeds are not exactly legal, but still quite often achieved in said country.
    Last edited by Naes-Landy; 2018/01/10 at 11:48 PM.
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  12. #11
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    Default Re: Tyre wear.

    The way that I understand it is that the flat tyre's shape deforms more while rolling than a properly inflated tyre. This causes more friction between the air molecules inside the tyre, causing it to heat up beyond spec.
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  13. #12
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    Default Re: Tyre wear.

    More heat generated due to rubber flexing at low pressures than air molecule friction.

    For under inflated tyre to wear in centre of tread would be more due to centrifugal forces at sustained high speed. Be amazed to see how much a low pressure tyre grows at high speed, found this out in my motorcycle racing days when running set with rear tyre close to back of swing arm.

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