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  1. #1
    Banned. CKey_Cal's Avatar
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    Knock and creak from seat post

    After about 400 miles my Specialized Roubaix developed a "knock" which turned into a pronounced "creak" after another 100 miles or so. I finally determined it to be the seat post by removing it and re-greasing the seat post clamp. The seat post has the words "do not grease seatpost" right on it, so I didn't.

    The problem is that the knock came back after about 200 miles. About 2 weeks. I repeated the above and now its fine again. Is this normal? It seems a little to soon to me to have to re-grease. What could I be doing wrong?

  2. #2
    Senior Member swskeptic's Avatar
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    If you fixed it, then whats the problem?
    Originally Posted by BarracksSi: "So yeah, bikes are like pizzas. They're all different, and they can be tweaked to one's preferred taste. But in the end, none of them suck -- because they're still pizzas."
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  3. #3
    Banned. CKey_Cal's Avatar
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    Quote Originally Posted by swskeptic View Post
    If you fixed it, then whats the problem?



    The problem is that the knock came back after about 200 miles.

  4. #4
    Senior Member
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    Use carbon prep on carbon components to stop creaks. I had the same problem on my Roubaix.

  5. #5
    Banned. CKey_Cal's Avatar
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    Quote Originally Posted by jimblairo View Post
    Use carbon prep on carbon components to stop creaks. I had the same problem on my Roubaix.
    Excuse my ignorance. This is only my second bike - but what is carbon prep and how do I use it?

  6. #6
    Senior Member z415's Avatar
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    Quote Originally Posted by bhammer View Post
    Excuse my ignorance. This is only my second bike - but what is carbon prep and how do I use it?
    You have a CF seatpost which is too smooth to use grease on. Un-greased ones have been known to slide down over time and use. Carbon prep is like grease for carbon, basically. Here you can buy it (thought you can find it cheaper elsewhere), but more importantly they'll tell you all you need to know about anything you can buy there: http://www.competitivecyclist.com/ro...3321.52.1.html
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

  7. #7
    Banned. CKey_Cal's Avatar
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    Quote Originally Posted by z415 View Post
    You have a CF seatpost which is too smooth to use grease on. Un-greased ones have been known to slide down over time and use. Carbon prep is like grease for carbon, basically. Here you can buy it (thought you can find it cheaper elsewhere), but more importantly they'll tell you all you need to know about anything you can buy there: http://www.competitivecyclist.com/ro...3321.52.1.html
    Thanks. Is that the same as this stuff?

    http://www.jensonusa.com/store/produ...n+Compoun.aspx

  8. #8
    messenger
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    that's really a cute bunny.....................

  9. #9
    Senior Member z415's Avatar
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    Quote Originally Posted by bhammer View Post
    Thanks. Is that the same as this stuff?

    http://www.jensonusa.com/store/produ...n+Compoun.aspx
    Yes, same functionally, but it seems to look more, well, bright, lol.

    Now that I am looking into it, would carbon assembly paste be that same at car detailing stuff, specifically gritbased swirl and scratch removers? Oh and that was directed to people more in the know - sorry, OP.

    By the way, I don't know how your LBSs (Local Bike Shops) are, but I have one here that'll sell me just a dollop of grease/assembly paste/stuff like that in a little baggie for a buck. That might be the way to go.
    Last edited by z415; 08-25-08 at 02:39 PM.
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

  10. #10
    Senior Member z415's Avatar
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    Quote Originally Posted by G piny parnas View Post
    that's really a cute bunny.....................
    Thanks, bunnies are cool. Has qualities of dogs and cats and will always act like a adolescent human child.
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

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