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25.4mm Wide Seatpost in 27.2mm Frame

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  • 25.4mm Wide Seatpost in 27.2mm Frame

    Hey,

    I have a Kris Holm 25.4mm wide seatpost. Will this seat post be able to fit snug enough in a 27.2mm Impact gravity frame? What I'm wondering is if a couple of mm will make a difference in tightness when the frame is just a few mm bigger. I am in a slight hurry so if you guys could respond and help me out that'd be great!

    -Nate
    Last edited by trueuni; 2013-05-03, 11:22 PM.

  • #2
    Originally posted by trueuni View Post
    Hey,

    I have a Kris Holm 25.4mm wide seatpost. Will this seat post be able to fit snug enough in a 27.2mm Impact gravity frame? What I'm wondering is if a couple of mm will make a difference in tightness when the frame is just a few mm bigger. I am in a slight hurry so if you guys could respond and help me out that'd be great!

    -Nate
    You would need a shim; just trying to tighten it won't work. You can get them online, or get lucky at a local bike shop (but there are so many size possibilities that you probably won't find the right one, and the "adjustable" ones don't work in my experience).

    You could also try making your own shim out of sheet aluminum or even something like a piece of hose, though it won't be as secure as a proper one.

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    • #3
      Adapter shims:
      Here's one on ebay.
      Here's one on amazon.

      --> Grease for your Schlumpf hub (free shipping!) <--

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      • #4
        I have use a piece or two of plastic yoghurt or butter container for this type of thing.
        Thin and very strong.
        You would need to renew occasionally if you were moving the post often.
        ______________________
        Nimbus II 20"
        Oracle 24"

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        • #5
          soda cans work even better! i am riding with a shimed post right now
          Roses are red, violets are blue, may I procreate with you so I can ride a g32!! - Alan hogan

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