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  1. #1
    Senior Member mulchie's Avatar
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    My seat keeps slipping down!

    Is there any way to fix a bike seat that keeps dropping about an inch every time I ride? This is pretty annoying and I suspect it might be what makes my knees feel a twinge, too.
    I'd prefer not to buy a new post since it's an older bike and I am thinking of replacing in a year if I am still mildly biking obsessed.
    ?????

  2. #2
    Hey guyz? Guyz? Wait up!! Siu Blue Wind's Avatar
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    Cut a piece of soda can as a shim.
    Quote Originally Posted by Buddha
    We are what we think. All that we are arises with our thoughts. With our thoughts, we make the world.
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    Please dont outsmart the censor. That is a very expensive censor and every time one of you guys outsmart it it makes someone at the home office feel bad. We dont wanna do that. So dont cleverly disguise bad words.

  3. #3
    You need a new bike supcom's Avatar
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    If you have a quick release seatpost clamp, try a bolt-type. I had this problem on a hardtail and replacing the clamp did the trick.

  4. #4
    Senior Member Bluechip's Avatar
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    I 2nd the soda can idea. It's worked for me.

  5. #5
    Loco Motive Member Steve Hamlin's Avatar
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    Mine seat keeps slipping down, too . . .

    I've written it off to middle age. . . Oh, you mean your BIKE seat. . .

    (The preferred aluminum can to use for a shim is a beer can; cq: "Zen and the Art of Motorcycle Maintenance.")
    Roll away the dew!

  6. #6
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    I just solved this problem on my bike. I tried all sorts of ideas, a couple of different seatpost, collar, and bolt combinations; and a couple of different beer can shims, all with the help of the wonderful guys at Bike Source in Columbus. The only thing that was working was riding my 15 mile rt commute standing up.

    What finally worked was carefully cleaning all of the grease off the post and seattube with rubbing alcohol and then rubbing dirt (nice ohio clay fact) over the tube. No slip since.

    The mechs at B.S. suggested that once or twice a year I free the post and move it slightly, although this was the very last thing I tried so if it does cold weld at some point I'm no worse off than I was before (and it will still stay set at the correct height). Of course YMMV

  7. #7
    On my TARDIScycle! KingTermite's Avatar
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    Quote Originally Posted by supcom View Post
    If you have a quick release seatpost clamp, try a bolt-type. I had this problem on a hardtail and replacing the clamp did the trick.
    +1

    I had the same problem (and solution) too.
    Quote Originally Posted by coffeecake View Post
    - it's pretty well established that Hitler was an *******.

  8. #8
    Senior Member Garfield Cat's Avatar
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    What if you bought a brand new Thomson Masterpiece seatpost, used it and when you get a new bike, put the Thomson on it?

  9. #9
    Affable Aberrant G-Whacker's Avatar
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    I like the shim idea, but the first thought I had was a pipe clamp on the post (covered in duct tape of course!)
    --------------------------------------------------------------------------------
    Won't you pour me a cuban breeze, Gretchen?

  10. #10
    Banned
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    Quote Originally Posted by Garfield Cat View Post
    What if you bought a brand new Thomson Masterpiece seatpost, used it and when you get a new bike, put the Thomson on it?
    Because different frames require different size posts. Also the Thomson may require a shim too. Mine does.

  11. #11
    Senior Member Nermal's Avatar
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    The Thompson (elite is all I could afford) has very fine stirations around the length of the tube. That could help - I haven't mounted it yet.

    I fitted my other bike with a Salsa bolt type clamp and the problem went away, and am still keeping a little grease on the seatpost.
    Some people are like a Slinky ... not really good for anything, but you still can't help but smile when you shove them down the stairs.

  12. #12
    I pedal what I ride
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    if the shim doesn't fit then try putting loctite between the seatpost and the seattube

  13. #13
    "Big old guy"
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    First of all make sure you have the right size seatpost.
    Second get a bolt on seat post collar.
    Third go to a bike shop and ask for some of the grease that comes with some seatposts (I know FSA ships it) It is a gritty grease that you put on before installing the post.
    If that does not work go with some sand on the grease.

    I am heavy and I have had this problem before, interestlly enough the Thompson which has the lathe cuts so it should stay up was one of the worst post I had for slipping. I hope this helps.
    The Older I Get, The Better I Was.

  14. #14
    www.chipsea.blogspot.com ChipSeal's Avatar
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    A common problem with carbon frames and carbon seat posts. In that situation a dab of "technical grease" solves the problem. I truly does work as advertised.

    http://www.tacx.com/producten.php?fl...enance%20Tools
    Vehicular cycling techniques have not been tried and found difficult. They have been presumed difficult and not tried.

  15. #15
    Senior Member mulchie's Avatar
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    I've now tried alcohol, toothpaste (!) then spit and dirt. So far so good. 2.5 bumpy miles w/ no slip (sorry, but the toothpaste alone didn't work at all).
    But I'm taking her in for a tune up on Sunday and I'll see if they can do the right thing w/ the mechanics grease.
    all useful advice. Thanks everyone.

  16. #16
    Senior Member Nermal's Avatar
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    Quote Originally Posted by hoss10 View Post
    I am heavy and I have had this problem before, interestlly enough the Thompson which has the lathe cuts so it should stay up was one of the worst post I had for slipping. I hope this helps.
    Thanks. Thanks ever so much for filling me in on my new but untried thompson.
    Some people are like a Slinky ... not really good for anything, but you still can't help but smile when you shove them down the stairs.

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