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  1. #1
    There's no need to fear.
    Reputation: Boofhead's Avatar
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    DT Swiss XR Carbon - Ball Joint Bushings?

    Just doing a bit of overdue work on my Rocky Mountain Altitude 90 and noticed something a bit odd. The shock is a DT Swiss XR Carbon and appears to have some sort of ball joint bushing thing going on - sort of like a cars suspension. I grabbed hold of the shock and I was blown away when it rotated a few degrees. I didn't have time to take it apart to check it out completely.

    Have I got a bushing problem or is that the way it is supposed to work? It feels fine when riding but really took me by surprise.

    Thanks in advance.

    B

  2. #2
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    It has ball joint bushings, yes. Just out of curiosity -> which car, apart from race cars, has such bushings? Actually I've never come across this on a normal street vehicle.

  3. #3
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    Yes that's normal. Some of the DT shocks use normal bushings too. The spherical bearings are only good for short spans.
    Owner of www.shockcraft.co.nz and NZ Manitou Service Agent.
    www.dougal.co.nz Suspension setup & tuning.
    SPV Devolve

  4. #4
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    Quote Originally Posted by Dougal View Post
    The spherical bearings are only good for short spans.
    Why ???

    They make the rear end much plusher and they take any rear play from the rear swing arm then they don't get shaft wear from it, downside being the don't help to stiffen up the rear end.

  5. #5
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    Thanks very much for the replies, guys. Just as I'd hoped/expected. Cool feature.

    Radical, race cars actually have the same set up as this? You learn something new everyday. I was only talking about the ball joints on the upper and lower control arms.

    Cheers.

  6. #6
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    Yes. On a normal car you usually have rubber with metal inlays to connect the different parts, wishbones for example, to the car body. Race cars ultimately use these spherical bearings to get direct reactions without any play.

  7. #7
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    Quote Originally Posted by Turveyd View Post
    Why ???

    They make the rear end much plusher and they take any rear play from the rear swing arm then they don't get shaft wear from it, downside being the don't help to stiffen up the rear end.
    Span as in width, not span as in length of time.
    Owner of www.shockcraft.co.nz and NZ Manitou Service Agent.
    www.dougal.co.nz Suspension setup & tuning.
    SPV Devolve

  8. #8
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    Quote Originally Posted by Dougal View Post
    Span as in width, not span as in length of time.
    Thats okay then, thought I'd missed something and they where rubbish.

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