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Thread: Warning over old tyres

  1. #76
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    Quote Originally Posted by Kickaha View Post
    I'd be willing to bet most of those "user issues" that cause the failures would be incorrect inflation pressures
    Underinflation is a good killer of all tyres, from wheelbarrow to truck.



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  2. #77
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    I just read somewhere that almost all motorcycle tyre problems were due to underinflation.

    Was there not a recall involving Michelin Pilot Powers in the last year or two?

  3. #78
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    Quote Originally Posted by pritch View Post
    I just read somewhere that almost all motorcycle tyre problems were due to underinflation.

    Was there not a recall involving Michelin Pilot Powers in the last year or two?
    That doesn't surprise me at all! And yes, there was a recall on Pilot Powers three years ago, pretty sure it only applied to the US though but here's the infor if anyone wants to check their tyres: http://thekneeslider.com/archives/20...e-tire-recall/ & http://www.roadracingworld.com/news/...?article=29445

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  4. #79
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    Quote Originally Posted by cs363 View Post
    That doesn't surprise me at all! And yes, there was a recall on Pilot Powers three years ago, pretty sure it only applied to the US though but here's the infor if anyone wants to check their tyres: http://thekneeslider.com/archives/20...e-tire-recall/ & http://www.roadracingworld.com/news/...?article=29445
    Mmm, due to their 300kg long wheelbase ZZR's and the ilk running 20 psi.... at a pick.

  5. #80
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    How about those running Shinko 705's on Triumph Tigers with the tyre pressures set according to the sidewall.
    33psi and massive overheating and blistering rubber.

    On a DR650 - no problem at those pressures.
    They're getting the sidewall's on the new ones to read 36psi max.

    I'm using an Avon Gripster with a manufacturing date of 1996 on the rear at the moment.
    But only until I get the $ together for a pair of 705's.

  6. #81
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    Quote Originally Posted by NordieBoy View Post
    How about those running Shinko 705's on Triumph Tigers with the tyre pressures set according to the sidewall.
    33psi and massive overheating and blistering rubber.

    On a DR650 - no problem at those pressures.
    They're getting the sidewall's on the new ones to read 36psi max.

    Whats the difference in the weight of those bikes?
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  7. #82
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    Quote Originally Posted by Kickaha View Post
    Whats the difference in the weight of those bikes?
    About 50Kg based on 2007 models....

    Before you judge a man, walk a mile in his shoes. After that, who cares? ...He's a mile away and you've got his shoes

  8. #83
    Quote Originally Posted by pritch View Post
    I just read somewhere that almost all motorcycle tyre problems were due to underinflation.
    I've been doing it wrong all these years....I always run underinflated.My choice,I haven't crashed for it,and have no tyre problems.

  9. #84
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    Quote Originally Posted by Motu View Post
    I've been doing it wrong all these years....I always run underinflated.My choice,I haven't crashed for it,and have no tyre problems.
    Ummm, a few PSI below the recommended can be fine... so long as it doesn't cause undue wear.
    Lett pressure can mean more mechanical grip... right to the poing the sidewalls flex so much that they no longer perform their function.... and you get a "walking" sensation.

    Bare in mind that there is always some sidewall flex in tyres. Just too much is not the best.

  10. #85
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    I suspect Mr Motu runs more than a few psi under. He knows what he is doing.
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  11. #86
    Quote Originally Posted by quickbuck View Post
    and you get a "walking" sensation.
    .
    Walking is good - I know where I am when they start walking.

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