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Using a seatpost shim

mikeyj28mikeyj28 Posts: 754
edited November 2012 in MTB workshop & tech
I have a carbon seatpost 27.2 mm that I love. It's too small or my anthem but I'd still like to use it with a shim if possible?
1: would the seatpost keep slipping under load?
2: if I move from back to front on the seat will the post slip or move about?
3: are seatposts more prone to breaking in a shim?

I'd rather not buy a new carbon post if I can hlp it.

Thanks
Constantly trying to upgrade my parts.It is a long road ahead as things are so expensive for little gain. n+1 is always the principle in my mind.

Posts

  • warpcowwarpcow Posts: 1,448
    It shouldn't slip and it shouldn't break either. Try to get as long a shim as possible though. This is more to protect the frame than the post, but it's still not much of an issue.
  • nicklousenicklouse Posts: 50,675 Lives Here
    it is advisable to use a shim with a carbon post as it reduces the chances of damaging it.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • .blitz.blitz Posts: 6,197
    mikeyj28 wrote:
    I have a carbon seatpost 27.2 mm that I love. It's too small or my anthem but I'd still like to use it with a shim if possible?
    I used an inexpensive Brand-X shim with a Race face carbon post and it worked fine.

    It only lasted a few rides though the 27.2 sp looked all wrong in a 31.6 frame.
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