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Thread: help quik!

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    Senior Member zx108's Avatar
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    help quik!

    a thomson post is at $25 on ebay and closes in 1 hour.

    but i dont know the post diameter of my current seatpost. it is a crap kona post that came with the bike. anyone know how i can find the diameter?

    some fast resposnses would be great!

  2. #2
    Lost in the Black Hills mx_599's Avatar
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    Quote Originally Posted by zx108
    a thomson post is at $25 on ebay and closes in 1 hour.

    but i dont know the post diameter of my current seatpost. it is a crap kona post that came with the bike. anyone know how i can find the diameter?

    some fast resposnses would be great!
    you should be able to measure across with a metric ruler and estimate to the 10th of a mm

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    Senior Member zx108's Avatar
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    it measured an inch across and that is 25 some mm and the post was 27 some mm

    crap.

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    Senior Member zx108's Avatar
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    actually i just converted inches to to mm and it was the right size

    i just missed out on a perfectly good thomson post for 25 bucks. arrrrrrg

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    Quote Originally Posted by zx108
    a thomson post is at $25 on ebay and closes in 1 hour.

    but i dont know the post diameter of my current seatpost. it is a crap kona post that came with the bike. anyone know how i can find the diameter?

    some fast resposnses would be great!
    This guy was parting out a 2005 Stumpy S-Works...there's still some stuff out there ending within the next couple of days...

  6. #6
    Lost in the Black Hills mx_599's Avatar
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    Quote Originally Posted by zx108
    actually i just converted inches to to mm and it was the right size

    i just missed out on a perfectly good thomson post for 25 bucks. arrrrrrg
    1 inch = 25.4mm

    according to what you wrote above, you didn't miss out on anything. was your seat post 25.4 and the one he was selling 27 or not?

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    If it's the action I think it is, then it was a 30.9mm layback post.

    Edit: It wasn't. This is the one I was thinking of. It's at $25 right now. This guy has a ton of stuff up for auction right now, but nothing I'm interested in.

  8. #8
    Senior Member zx108's Avatar
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    Quote Originally Posted by mx_599
    1 inch = 25.4mm

    according to what you wrote above, you didn't miss out on anything. was your seat post 25.4 and the one he was selling 27 or not?
    i was all confused before. i was deciding to bid on the thomson and bidding on a stem at the same time. and i lost the stem in the last seconds

    i used a calc. and it converted 1 inch to mm and it was 25 and i converted 27mm to inches and it was 1 inch. . . the one i wanted to buy was 27mm

    thanks for the tip mtb, i am not looking for a setback though. there is one or two posts that have a day or so left, il see what they are doing tommorow

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    Lost in the Black Hills mx_599's Avatar
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    Quote Originally Posted by zx108

    i used a calc. and it converted 1 inch to mm and it was 25 and i converted 27mm to inches and it was 1 inch. . . the one i wanted to buy was 27mm
    27mm to an inch was a bad calculation. whatever you were using, try to find something more accurate. 1.6mm is very significant

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    Svr
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    The post diameter is usually stamped on it somewhere. Look carefully.

    There's too much of a chance of making a measuring error unless you're using a caliper. A measuring tape just won't cut it.

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