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  1. #1
    . blickblocks's Avatar
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    Seatpost sizing for Panasonic Sport 1000

    I bought my friend and I each a Forte Precision seatpost at Performance today because they were really cheap, and we both wanted new ones anyways. We both have Panasonic Sport 1000's, and I used a caliper to measure the post which came to 26.85mm, so I bought 26.8mm posts. I can't get the new post in! Sheldon Brown wrote that the DX-2000 uses a 26.6mm post but that uses a totally different tubeset. Anyone know what size I need?

  2. #2
    All around nice guy BRANDUNE's Avatar
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    26.6

  3. #3
    . blickblocks's Avatar
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    Quote Originally Posted by BRANDUNE View Post
    26.6
    Hmm. Thanks!

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    . blickblocks's Avatar
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    My friend finally got around to installing the 26.6 Kalloy seatpost...except it wouldn't fit. I'm going to try installing it on my bike sometime tonight, but the thing is my friend really needs a new post. Anyone have a clue? They're both Tange 900 tubesets.

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    Quote Originally Posted by blickblocks View Post
    I bought my friend and I each a Forte Precision seatpost at Performance today because they were really cheap, and we both wanted new ones anyways. We both have Panasonic Sport 1000's, and I used a caliper to measure the post which came to 26.85mm, so I bought 26.8mm posts. I can't get the new post in! Sheldon Brown wrote that the DX-2000 uses a 26.6mm post but that uses a totally different tubeset. Anyone know what size I need?
    measure the INSIDE OF THE FRAME TUBE with the caliper: make sure you rotate the caliper while holding tension, so you get an accurate measurement (use the inside measurement ears) then release tension, and read the dial/screen.

    you can also use these for accurate inside measurements of tubes:
    http://www1.mscdirect.com/CGI/NNSRIT...51690&PMT4NO=0

    you stick the "T" head down the tube, and tighten the dial, then remove and measure with a caliper, for EXTREMELY accurate inside measurements.

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    For what it's worth, my Track 4000 uses 26.6 as well.
    trued 'till death

  7. #7
    . blickblocks's Avatar
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    Quote Originally Posted by Igneous Faction View Post
    For what it's worth, my Track 4000 uses 26.6 as well.
    That uses Tange 1000 right?

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    :jarckass: deathhare's Avatar
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    If you measured at the top you wasted your time.

  9. #9
    . blickblocks's Avatar
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    Quote Originally Posted by deathhare View Post
    If you measured at the top you wasted your time.
    Top of the post or top of the seat tube? I took out the post and measured an average, all around, 26.85mm.

    I'll return back after I try installing the post.

  10. #10
    out of shape
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    i can confirm that the DX2000 (tange 900) is 26.6 at some point. mine is similar vintage to igneous' track 4000.

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    I'll go check what size my sport 500 and 1000 have...

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    I got some weird readings but it appears to be around 26.1

    edit: sport 1000 with 1020 tubing

  13. #13
    :jarckass: deathhare's Avatar
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    Quote Originally Posted by blickblocks View Post
    Top of the post or top of the seat tube? I took out the post and measured an average, all around, 26.85mm.

    I'll return back after I try installing the post.
    Im sorry.
    I thought you measure the top of the seat tube.

  14. #14
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    Track 4000 uses Tange 2.
    trued 'till death

  15. #15
    Member jobe149's Avatar
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    hammer.

  16. #16
    . blickblocks's Avatar
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    I just used my dial caliper...seems like the original seatpost is closer to 26 than 26.6. Oh well. I wonder why I originally measured 26.85...I used a digital caliper then!

  17. #17
    cab horn
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    Quote Originally Posted by jobe149 View Post
    hammer.
    Worst advice i've ever seeen.

    http://www.sheldonbrown.com/stuck-seatposts.html
    Last edited by operator; 02-02-08 at 10:32 AM.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  18. #18
    THIS SPACE FOR RENT
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    Tubeset model isn't necessarily going to determine SP size.

    Step 1: Take bike to shop.
    Step 2: Ask them to measure it using a SP gauge (Devo hat looking thing, pic somewhere on Sheldon) or by just trying cheap posts.
    Step 3: Buy the size you actually need.

    To do it with calipers you really have to measure all the way down as far as they will reach, even then it's better to just do it right.
    "I don't buy new frames, it just encourages them."

    -T.G.

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