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Seat post keeps slipping

  • 12-08-2014 10:40am
    #1
    Closed Accounts Posts: 18,268
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    I have a Raleigh pioneer hybrid and my seat post keeps slipping down.
    Is there anything I can do to stop it happening?
    Thanks


Comments

  • Registered Users, Registered Users 2 Posts: 6,460 lennymc
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    there is a friction paste you can get that is designed to increase the friction between the seat post and the seat tube, which should stop your problem.

    Something like this - http://www.trisports.com/fsa-installation-compound-friction-paste.html


  • Registered Users, Registered Users 2 Posts: 157 RV
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    Had that on a new bike and the LBS replaced the seatpost


  • Registered Users, Registered Users 2 Posts: 14,318 Raam
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    Maybe the seat clamp is a bit knackered.


  • Registered Users, Registered Users 2 Posts: 336 franer1970
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  • Closed Accounts Posts: 18,268 uck51js9zml2yt
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    thanks for the replies.
    I got a new screw for the seat last week and its still slipping.

    I'll try the clamp and friction paste.
    Don't have the option of going to an LBS.Bought it second hand. I can always get a new post if it the alternatives don't work.


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  • Registered Users, Registered Users 2 Posts: 16,414 Trojan
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    Could be as simple as cleaning the seat post and the seat tube/clamp with washing up liquid. (Mine got some grease on there from somewhere, so needed hot soapy water to sort it out.)


  • Closed Accounts Posts: 2,505 colm_gti
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    Trojan wrote: »
    Could be as simple as cleaning the seat post and the seat tube/clamp with washing up liquid. (Mine got some grease on there from somewhere, so needed hot soapy water to sort it out.)

    There's supposed to be grease on it so it doesn't seize. You're making matters worse by cleaning it with a detergent like that.

    I would put money on it that the seatclamp is buggered.


  • Registered Users, Registered Users 2 Posts: 3,308 quozl
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    I don't think you're meant to use grease with a carbon post. My deda carbon seat-post had a big warning not to use grease, so I tried my best to clean out the grease that was already in the seat-tube.


  • Registered Users, Registered Users 2 Posts: 16,414 Trojan
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    colm_gti wrote: »
    There's supposed to be grease on it so it doesn't seize. You're making matters worse by cleaning it with a detergent like that.

    I've had no problem with it seizing - it's MTB so it's up and down fairly regularly - but I very much had a problem with it slipping when it shouldn't before :)


  • Registered Users, Registered Users 2 Posts: 2,731 Type 17
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    Grease should be used on non-carbon metal seat posts and frames, especially on steel frames with an alloy post - water (rain, or spray from the back wheel, when there are no mudguards) causes an electrolytic reaction which can be so severe that the frame has to be discarded if the seat post gets damaged, as they cannot be separated.

    Grease will not cause slippage for metal parts if the clamp is working, and nothing is worn or bent - if the post is slipping, then something is worn, or loose - alloy seat posts often get worn through slippage if the clamp isn't kept tight enough for a while, and then that wear means that even if the clamp is tightened properly later on, slippage still happens - deep vertical grooves on the rear of and alloy seat post can be an indication of this problem.

    Grease should NOT be used with carbon frames or seat posts - the grease soaks into the carbon, causing swelling and it can be impossible to move the seat post without cracking the frame or post. Special carbon assembly paste is used to prevent slippage without swelling.


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  • Closed Accounts Posts: 4,744 diomed
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