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Thread: Humming and Shaking at 60mph

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    confused Humming and Shaking at 60mph

    Hi Guys

    My Vectra C started with a slight hum a few months back, the garage said that it would be the wheel bearing on the rear passenger side, it was not dangerous and that they would address the issue when the car goes for next service. Over the last few months, the hum has got loader, and only happens between 60 - 70mph, the car shakes at 80mph but at 90mph everything seems OK, no noise or shaking.

    Anyway, my brother was over at the weekend replacing my pads, he took my rear wheels off to see that my passenger rear tyre was worn to the thread on the inside, however, there wear was not even, it was 'eggy'. The driver's side tyre was fine, even wear and with about 2mm tread left.

    So, I have just replaced my rear tyres, now, there is no noise or shaking at all, which leaves 2 questions

    1. Why would I have such bad tyre wear on just one side on the back, and
    2. What is the likely hood that it was my bearing that was causing the hum, I have read other forums that suggest uneven tyre wear can be the cause of the hum.

    My front 2 tyres are fine, even wear accross both tyres and both evenly worn. I live in an area with a lot of round-a-bouts, so this obviously puts more weight on the passenger side, but would this cause uneven wear to just the rear?

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    Regular Member DarylAAS's Avatar
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    Sounds like it was just the tyre causing the hum... and i would go and get a full geometry check aswell as it sound like its out...

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    most likely a tyre is out of balance, could be a wheel weight has come off?

    if not stop humming and speak to a doctor about the shaking!

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    Get your geometry checked as it could be causing the uneven wear. Should always get these symptoms checked out as damage to the wall of a tyre causing a bulge will unbalance it and can cause vibration more obvious at vertain speeds. Happened to a tyro on my Mondeo. I thought it was a lost balance weight but it was a bulge on the inner wall which could have caused a nasty blow out.

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