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  1. #1
    Commuter OrgFarmCY's Avatar
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    9 1/2 inches of exposed seatpost

    Bad Idea?

    --Aaron

  2. #2
    THIS SPACE FOR RENT
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    LOA of seatpost? Frame make?
    "I don't buy new frames, it just encourages them."

    -T.G.

  3. #3
    Commuter OrgFarmCY's Avatar
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    It's an old frame a friend has. I happen to like it alot, but it has a short ST. It has a perfect top tube length, but the seat tube is about 5 cm shorter than it should be.

    EDIT: This is a picture of my frame fit, is that measurement to the top of the seatpost, or top of the saddle?

    If it's saddle, that would knock it down to 7 1/2 inches of exposed seatpost


    --Aaron
    Last edited by OrgFarmCY; 01-24-07 at 06:30 PM.

  4. #4
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    If you can get the bars high enough and have a decent seatpost that was meant to extend that far you're fine.

  5. #5
    TRUED 'TIL DEATH DerekRI's Avatar
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    Quote Originally Posted by OrgFarmCY
    My road bike fit has me at somewhere around 2 cm of exposed post

    2cm exposed post? whaa?

  6. #6
    Commuter OrgFarmCY's Avatar
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    Crappy math, I posted a picture of the bike fit I got at Providence bike.

    --Aaron

  7. #7
    crazy keeper b-ride's Avatar
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    Quote Originally Posted by OrgFarmCY
    Bad Idea?

    --Aaron
    it depends how much post is in the seat tube. if you've only got an inch in the seat tube, you risk ovalizing it or worse, ie having that mf wrench out of there while you're riding. there should be a line (i call it a guideline) on the seat post that says minimum insertion or something like that, but you can usually get away with raising it another inch or so. but if you're a real clydesdale or have a super slack seat tube angle, i woiuldn't risking funking around too much.
    riding a bike is NOT probable cause

  8. #8
    /\/\ \/\/ Nouia's Avatar
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    As long as you have enough seat post in the frame I think it's totally fine. I see 350mm (~13.5 inches) seat posts on nashbar all the time. Assuming the minimum insertion mark is around 100mm, that gives you almost 10 inches to play around with. Run some mtb riser bars on it. Post pics.

  9. #9
    Senior Member
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    Pervert.

  10. #10
    one word, not two braingel's Avatar
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    my mtb has a salsa seatpost that sticks out about a foot.

  11. #11
    not a role model JeffS's Avatar
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    I don't like it, but quite a few MTB manufacturers have gone to really short seat tubes lately, resulting in huge seat post requirements. People seem to be getting by just fine with them though.




    Personally, I think this is just a ploy to minimize frame weight for the weight-concious crowd.

  12. #12
    . blickblocks's Avatar
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    Quote Originally Posted by JeffS
    I don't like it, but quite a few MTB manufacturers have gone to really short seat tubes lately, resulting in huge seat post requirements. People seem to be getting by just fine with them though.




    Personally, I think this is just a ploy to minimize frame weight for the weight-concious crowd.
    It looks to me like this style increases hub-to-crank stiffness but gives a softer ride for your butt. Not sure if it ends up heavier or lighter though...

  13. #13
    Geek Extraordinaire sivat's Avatar
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    As long as you have the post inserted above the minimum insertion, your only issue would be a pretty substantial saddle to bar drop.
    I'd rather have a bottle in front of me than a frontal lobotomy.

    Sintesi Conversion Serotta Track

  14. #14
    mofo
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    The rule of thumb is to have the post inserted below the intersection of the TT & the ST, minimum. Clear the TT and you should be fine.

  15. #15
    spastic in time billypilgrim's Avatar
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    i know plenty about 9 1/2 inches getting exposed, but none about this "minimum insertion". anyways, lets get back to bike talk.
    we all know there's been a conspiracy.
    only the failures have been recorded.
    we all pay too much attention to Icarus,
    and not enough to his father. -Peter Greenaway, The Falls

  16. #16
    jack of one or two trades Aeroplane's Avatar
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    Quote Originally Posted by billypilgrim
    i know plenty about 9 1/2 inches getting exposed, but none about this "minimum insertion". anyways, lets get back to bike talk.
    +1. 9 1/2 inches of anything is always good.
    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.

  17. #17
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    Quote Originally Posted by billypilgrim
    i know plenty about 9 1/2 inches getting exposed, but none about this "minimum insertion". anyways, lets get back to bike talk.
    <peter griffin> COUNT IT! </peter griffin>

  18. #18
    Senior Member
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    i don't wanna brag or nothing.. but my seatpost is ~13 in

    (old centurion with easton ea 50 seatpost, no issues yet)

  19. #19
    Strange As Angels Fixxxie's Avatar
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    Quote Originally Posted by billypilgrim
    i know plenty about 9 1/2 inches getting exposed, but none about this "minimum insertion". anyways, lets get back to bike talk.
    I was wondering how long it would take until somebody mentioned that
    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.

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