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  1. #1
    :jarckass: deathhare's Avatar
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    Big pipe..little hole

    Sounds like fun but maybe not. 26.8 seat post in a 27.2 hole.
    Will it work or do i HAVE to have a shim?
    Thanks

  2. #2
    thomas masini lives
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    sounds like you got it backwards

    have you tried sticking it in yet?

    do you have reason for no shim?

  3. #3
    Senior Member
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    shim or get the right post.

    You will compress or ovalized the seat tube trying to keep the 26.8 in there tight.

  4. #4
    :jarckass: deathhare's Avatar
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    Thanks for the comments. Normally id get a new post. The seat post is a Sugino Mighty NJS post so i really wanna be able to use this thing. I looked for a shim yesterday and couldnt find one. Ill look more.
    thanks

  5. #5
    Taking "s" outta "Fast" AfterThisNap's Avatar
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    yea, you'll end up hurting the frame. Unfortunately the only shim's I've seen for that combo are "cone" types with a lot of excess shim popping over the seat tube, but then again, I haven't looked super hard.
    Carries suspicious allegiance to Brooklyn Machine Works.

  6. #6
    LF for the accentdeprived
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    Soda can? I *think* it should work, shouldn't it? Untidy but better than pinching the frame together.
    Quote Originally Posted by dutret
    Do you deny that you are clueless or do you just think that "moron" didn't need to be tacked on there?
    Bike on flickr and on FGG

  7. #7
    aka mattio queerpunk's Avatar
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    personally, i wouldn't risk messing up my frame or having an unstable seatpost interface just to have the right stylish seatpost in there.
    the hipster myth.

    i practice vagabondery.

  8. #8
    jack of one or two trades Aeroplane's Avatar
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    Sell it to the poor bastard who has a nearly complete NJS setup and just needs that 26.8 post. Then buy a Kalloy and a pound of weed.
    Quote Originally Posted by Dr Irwin Goldstein
    Men should never ride bicycles. Riding should be banned and outlawed. It is
    the most irrational form of exercise I could ever bring to discussion.

  9. #9
    antisocialite dirtyphotons's Avatar
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    Quote Originally Posted by Aeroplane
    Sell it to the poor bastard who has a nearly complete NJS setup and just needs that 26.8 post. Then buy a Kalloy and a pound of weed.


    cheap seatpost that fits > grand mighty seatpost with shim > ****ed up frame
    Quote Originally Posted by Sheldon Brown
    Because when fashion conflicts with function, I vote for function.

  10. #10
    Triathlon = Eat/Bike/Nap veggiemafia's Avatar
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    Quote Originally Posted by Aeroplane
    Sell it to the poor bastard who has a nearly complete NJS setup and just needs that 26.8 post. Then buy a Kalloy and a pound of weed.
    lollerskates.

  11. #11
    :jarckass: deathhare's Avatar
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    Quote Originally Posted by dirtyphotons


    cheap seatpost that fits > grand mighty seatpost with shim > ****ed up frame
    Yeah maybe i should sell. Any idea what i should ask for it? I dont think they make these anymore.

  12. #12
    Tiocfáidh ár Lá jfmckenna's Avatar
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    Judicious cutting of a beer can ought to work, has for me for years in the past.

  13. #13
    :jarckass: deathhare's Avatar
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    Quote Originally Posted by jfmckenna
    Judicious cutting of a beer can ought to work, has for me for years in the past.
    Yeah i think ill try that and see how it feels. If its not tight enough before tightening the clamp then ill ditch the NJS crap and get some proper chinese 10 dolla post. CJS?

  14. #14
    Strange As Angels Fixxxie's Avatar
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    It WILL slip no matter how much you crank it and this can possibly damage the frame so do not do it.
    I probably have a post I can sell cheap or trade if you want
    Quote Originally Posted by sefb222 View Post
    a good reason to form a demolition derby, for fixed gear bikes and the fools who love them.

  15. #15
    cxmagazine dot com pitboss's Avatar
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    where is the proof that a shimmed seatpost will screw up your frame?

    Yes - get the right thing the first time, but if deathhare wants to keep the seatpost, a shim might work. I have seen a good number of bikes with seatpost shims (the USE Alien suspension posts required one for certainm size frames) without any ill effects.
    http://images.google.com/images?svnu...=seatpost+shim
    the hard part on this request is finding a 26.8 to 27.2 shim...
    biketoolsetc and loosescrews have nothing in that range and it appears to be fairly uncommon.
    Deathlap - cyclocross, training, beer,...escape hatch

  16. #16
    :jarckass: deathhare's Avatar
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    Thanks, yeah i checked two shops today and they said a shim that thin doesnt exist. Maybe so cause
    .4mm is pretty damn thin. That would mean the walls of the shim would need to be .2mm....thinner than butter.
    Maybe ill give the ole Asahi shim a try.

  17. #17
    pompous windbag Smorgasgeorge's Avatar
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    That's what she said

  18. #18
    hunter, gatherer coelcanth's Avatar
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    no one makes a shim this close for seatposts..
    you need a shim .2mm thick (it's a circle, remember)

    you can try a can.. or even buy some shim stock, but then you'd be spending money you might as well spend on the right post

    whatever you do, don't overtighten the binder if your post is slipping.. that's how seatlugs get cracked all the time

  19. #19
    antisocialite dirtyphotons's Avatar
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    Quote Originally Posted by [165]
    where is the proof that a shimmed seatpost will screw up your frame?
    dunno if you were referring to my comment:

    cheap seatpost that fits > grand mighty seatpost with shim > ****ed up frame

    but i was referring to his question:
    Quote Originally Posted by deathhare
    Sounds like fun but maybe not. 26.8 seat post in a 27.2 hole.
    Will it work or do i HAVE to have a shim?
    i was posing my opinion that using the right seatpost is best. second best would be using a shim (which will work, but imho is less than ideal.)

    the worst idea would be to clamp a 27.2 clamp onto a 26.8 post with no shim. not only does it deform your seat tube, but it puts uneven pressure on your seatpost, causing you to have to torque it down even harder to keep it from slipping. i've cracked a seatpost and stripped an internal seatpost binder bolt this way, but of course, your results may vary.

    with a shim there is less contact area and unless it's cut PERFECTLY it will probably scratch your seat tube. i still believe that a cheap seatpost that fits would be superior to a nice post with a shim. but a shim is better than a ****ed up frame. that's all i was saying.
    Quote Originally Posted by Sheldon Brown
    Because when fashion conflicts with function, I vote for function.

  20. #20
    cxmagazine dot com pitboss's Avatar
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    it's all good

    I am 100% of the school of getting the right thing first. But sometimes there are ways to correct things without replacing them, and if this is done incorrectly, problems are imminent
    Deathlap - cyclocross, training, beer,...escape hatch

  21. #21
    dutret has a posse ryand's Avatar
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    > means greater than, not leads to. i read it the way photons intended.

    nitto makes handlebar shims for putting 25.4 bars in a 26.0 stem. super thin, i think you might be able to find it.

    of course, for the amount of money you payed for the frame, i would also find a proper seat post for it. trade or sell yours and buy a new seat post in the right size, njs approved if you MUST have that.
    Quote Originally Posted by kemmer View Post
    get drunk, ride a scooter, don't steal your girlfriends bike back, get laid anyway, post about it on the internets.

  22. #22
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    I would be worried about there being a few different metals touching each other. Ones going to expand at a different rate than the others leaving you with a stuck seat post.

  23. #23
    ★ ★ ★
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    Quote Originally Posted by Smorgasgeorge
    That's what she said
    somebody just had to, didn't they? i think it's standard forum protocol.

    thank god this thread isn't in the roadie forum...

  24. #24
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    Yo, shim it with a can!
    trued 'till death

  25. #25
    cxmagazine dot com pitboss's Avatar
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    Quote Originally Posted by ryand
    > means greater than, not leads to. i read it the way photons intended.
    i was understanding that when I posted - thanks
    Deathlap - cyclocross, training, beer,...escape hatch

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