fitting a carbon seatpost help please

gbr236
gbr236 Posts: 393
edited November 2007 in Workshop
Hi
I have bought myself a new carbon seat post.
Fitting to an aluminium frame do I use grease, degreaser or anything at all?

Comments

  • maddog 2
    maddog 2 Posts: 8,114
    No grease.

    Tacx do a carbon paste.

    I fitted mine dry

    Try a search, there have been a few threads about this.
    Facts are meaningless, you can use facts to prove anything that's remotely true! - Homer
  • phil s
    phil s Posts: 1,128
    There's a thread on weightweenies forum about this very topic as well, debunking the myth that grease is bad for carbon.
    -- Dirk Hofman Motorhomes --
  • nicklouse
    nicklouse Posts: 50,673
    have a read http://www.bikeradar.com/forum/viewtopic.php?t=12534958

    take it as you will.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • dennisn
    dennisn Posts: 10,601
    Bare carbon touching bare metal will cause corrosion and your seatpost may become,
    or should I say will become, frozen in the frame. Always use grease, it will not hurt carbon fiber. About the only thing that will hurt carbon fiber parts is paint remover.
    It will delaminate it.

    Dennis Noward
  • canamdad
    canamdad Posts: 165
    Like almost everything in cycling, there are lots of different opinions on carbon seat post installation and everyone gets to be right (or wrong). I have a couple of carbon seat posts in carbon and aluminum frames. I coat them with Permatex Hylomar HPF which comes in a tube and is sold in automotive stores. It's a non-hardening paste used for making gaskets and remains sticky. In my experience, it prevents interaction between the seat post and the seat tube and helps to prevent the seat post from slipping which is a not so uncommon problem. I also have used it on a alu seat post in a steel frame. There have been no problems with seatpost removal. If I couldn't find it, I think that I'd use the Tacx product mentioned above. Good luck!
  • aracer
    aracer Posts: 1,649
    dennisn wrote:
    Bare carbon touching bare metal will cause corrosion and your seatpost may become,
    or should I say will become, frozen in the frame.
    Though there isn't any bare carbon on the outside of a seatpost - it is in effect plastic.
  • Garybee
    Garybee Posts: 815
    aracer wrote:
    dennisn wrote:
    Bare carbon touching bare metal will cause corrosion and your seatpost may become,
    or should I say will become, frozen in the frame.
    Though there isn't any bare carbon on the outside of a seatpost - it is in effect plastic.

    It's usually laquered as well to make it look nice. This should be a good enough barrier to stop electro-galvanic action taking place and corroding your frame but any scores in the finish penetrating through to the carbon will undo this.
    Hypocrisy is only a bad thing in other people.

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