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  1. #1
    Join Date
    May 2002
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    Halfway Between the Gutter and the Stars
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    3,243

    Slipping seat post

    My seat post won't stay were I fucking leave it. I was out riding and noticed it had slipped down about an inch so I lifted it back to where I wanted it. A little while later it was down again so I tightened the bolt on the QR clamp and proceeded to bust the clamp lever. Fuck. So I mashed it closed with a rock and rode on. I stole a lever/bolt from a clamp I had laying around at home and replaced it. I tightened it and the post slipped, I tightened it more, and the post slipped, I tightened the nut with a pair of pliers then closed the QR. And the post slipped. I've got this fucker as tight as possible and it keeps slipping.

    Any suggestions for keeping the post were I want it? Throw some sand in the seat tube?
    You are what you eat.
    ---------------------------------------------------
    There's no such thing as bad snow, just shitty skiers.

  2. #2
    Join Date
    Oct 2003
    Location
    Banff
    Posts
    20,273
    1) it IS the correct size?

    2) clean post of most of lube, and very fine grit sand on the post


  3. #3
    Join Date
    May 2009
    Location
    inpdx
    Posts
    11,861
    is there any grease on the seat post?

    if no, put some on there
    (unless it's carbon, then find the fancy special sauce for it)

  4. #4
    Join Date
    Jan 2008
    Location
    Live Free or Die
    Posts
    1,016
    I've used a small section of beer can as a shim to prevent slipping in a similar situation.

  5. #5
    Join Date
    Feb 2011
    Location
    The Land of Subdued Excitement
    Posts
    5,482
    I had this problem with my hard tail, and I resolved it by putting a little grease on the quick release which made it so I could get it a little tighter.

  6. #6
    Join Date
    Mar 2008
    Location
    northern BC
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    18,033
    is it a carbon frame, is it the right size post, new frame, new bike, new post ???

    you gained 100lbs?
    Lee Lau - xxx-er is the laziest Asian canuck I know

  7. #7
    Join Date
    Mar 2008
    Location
    [a] Van [down by the river]
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    1,235
    What material frame? What material post?

    If it's a carbon post and carbon frame, you'll want some carbon paste... sure it costs like $5, but your bike probably wasn't that cheap, so just do it right. Apparently toothpaste works...

    If it's a carbon frame and an aluminum post, go get a carbon post, then see above comment... or else you'll have bigger problems.

    If it's aluminum on aluminum... any ghetto method works.

  8. #8
    Join Date
    Sep 2010
    Location
    Shuswap Highlands
    Posts
    2,358
    Install a dropper and use that variable height to your advantage?



    DISCLAIMER: I have yet to get a dropper myself

  9. #9
    Join Date
    Jan 2007
    Location
    in a van down by the river
    Posts
    2,773
    Have you considered loosing some weight
    I don't work and I don't save, desperate women pay my way.

  10. #10
    Join Date
    Dec 2004
    Posts
    12,037
    Vice Grips and really really tighten that fucker.

    You will thank me when you get to buy a new bike.

  11. #11
    Join Date
    Dec 2008
    Location
    The Trees
    Posts
    657
    On my aluminum trail bike I've had great luck rubbing the slipping seat post with chalk before clamping.
    That Don't Make No Sense

  12. #12
    Join Date
    Nov 2011
    Location
    Elmore, VT
    Posts
    980
    Quote Originally Posted by Cabinfever View Post
    On my aluminum trail bike I've had great luck rubbing the slipping seat post with chalk before clamping.
    chalk x2. blackboard chalk or climbers chalk (same thing?)
    If that doesnt work you must have some wrong sizing going on...

  13. #13
    Join Date
    Aug 2008
    Location
    Central VT
    Posts
    4,033
    Try a bolt thru seatpost collar, it will hold tighter than a QR one. Also use friction paste instead of grease.

  14. #14
    Join Date
    May 2002
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    Halfway Between the Gutter and the Stars
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    It's a giant Reign. Aluminium frame with stock dropper. I'm going to change the clamp for a bolted one and chalk the post.

  15. #15
    Join Date
    May 2010
    Location
    where the rough and fluff live
    Posts
    4,185
    If you read ADKMike's new bike thread, you'll see this topic addressed, Beaver.

    Remove post, clean seat tube & dropper post outer with rag & alcohol. Apply thin coat of carbon paste to seat tube & to dropper post outer tube. The carbon paste will prevent slide/twist issues. I'll bet you don't even need the lowest acceptable torque on the seat clamp to prevent post drop/twist. You use a torque wrench, right?

    Also, don't descend while in the saddle!

  16. #16
    Join Date
    May 2002
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    Don't decent while in the saddle? How's that going to work? I take my feet off the pedals, stick my legs out and go "Wheeeeeee" all the way down.
    You are what you eat.
    ---------------------------------------------------
    There's no such thing as bad snow, just shitty skiers.

  17. #17
    Join Date
    Sep 2005
    Location
    PRB
    Posts
    21,339
    install this seat post, problem solved!

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    "fuck off you asshat gaper shit for brains fucktard wanker." - Jesus Christ
    "She was tossing her bean salad with the vigor of a Drunken Pop princess so I walked out of the corner and said.... "need a hand?"" - Odin

  18. #18
    Join Date
    May 2010
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    where the rough and fluff live
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    Quote Originally Posted by Beaver View Post
    Don't decent while in the saddle? How's that going to work? I take my feet off the pedals, stick my legs out and go "Wheeeeeee" all the way down.
    That may work. Remember, "style" is key. Hence, I assume, Danno's post.

    I was thinking back to late 90s/early 00s, as I often do these days with "plus" and "extra wide" tires etc.

    People used to bend saddles, have slippy posts, etc because in that Shore-inspired era, they rode little "drops" sitting down. And unrelated to Shore-ness, I've known a few people who bent saddle rails because they descend sitting.

    Obviously if you post on TGR and aren't stuckie, you know to stand up.

  19. #19
    Join Date
    Oct 2010
    Location
    entrapped
    Posts
    919
    Paste it like creaky said

    Sent from my SM-G935V using TGR Forums mobile app
    No matter where you go, there you are. - BB

  20. #20
    Join Date
    Apr 2004
    Location
    Southeast New York
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    6,719
    Quote Originally Posted by Beaver View Post
    Don't decent while in the saddle? How's that going to work? I take my feet off the pedals, stick my legs out and go "Wheeeeeee" all the way down.
    That made me laugh

  21. #21
    Join Date
    Aug 2007
    Posts
    5,394
    Quote Originally Posted by Beaver View Post
    It's a giant Reign. Aluminium frame with stock dropper. I'm going to change the clamp for a bolted one and chalk the post.
    I have a 2015 Reign and it does the same thing. Extremely annoying. My old Reign also did the same thing.

  22. #22
    Join Date
    May 2002
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    Halfway Between the Gutter and the Stars
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    Quote Originally Posted by muted View Post
    I have a 2015 Reign and it does the same thing. Extremely annoying. My old Reign also did the same thing.
    Mine just happens to be a 2015 Reign too. I found my chalk line and dumped some chalk around the collar and rubbed it up and down the shaft with a good firm grip. Oh baby. I took it for a 30km ride on the weekend and it seems to have maintained position.
    You are what you eat.
    ---------------------------------------------------
    There's no such thing as bad snow, just shitty skiers.

  23. #23
    Join Date
    Mar 2008
    Location
    northern BC
    Posts
    18,033
    I just used some of that paste for carbon frames to quiet my creaky seat post, I bet that stuff would work on aluminium too
    Lee Lau - xxx-er is the laziest Asian canuck I know

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