Seat Post Safety
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  1. #1
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    Seat Post Safety

    Is 14.2 CMís in the set tube good? Please see pic...

    984D3B6D-AAE1-4166-BEC3-50DB8B8CE423.jpg

  2. #2
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    it should have a minimum insertion line on the seat post. I would use that as your line in the sand around safety.
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  3. #3
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    ...say it, duh...thereís not a min on a Thomson post but there is a Max. Iím good...

  4. #4
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    There will always be a line on the post that denotes the minimum insertion. If the post has been cut and the line is gone the general rule is 2.5 x diameter. General as in 'knee over pedal axle' or 'handlebars block the view of the front hub' type general. 140 some mm is definitely enough.
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  5. #5
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    Quote Originally Posted by cxwrench View Post
    There will always be a line on the post that denotes the minimum insertion. If the post has been cut and the line is gone the general rule is 2.5 x diameter. General as in 'knee over pedal axle' or 'handlebars block the view of the front hub' type general. 140 some mm is definitely enough.
    The other version....was the bottom of the post being inserted passed the bottom of the toptube/seattube junction.

    With people not being trusted to know rules of thumb...and then later bikes made of plastic with twig-thin top-tubes and minimal seat collar extensions....the min-insertion line was born IIRC.
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  6. #6
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    My Thomson post actually says Max...

    5D75871B-5753-40E9-989F-041A910D246B.jpeg

  7. #7
    'brifter' is a lame word.
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    Quote Originally Posted by saddle tramp View Post
    My Thomson post actually says Max...

    5D75871B-5753-40E9-989F-041A910D246B.jpeg
    That's max extension, same as min insertion, just different.
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  8. #8
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    Also, the minimum insertion/maximum extension line is for the top of the top tube, not the seat tube extension.

  9. #9
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    Min, max itís all the same

  10. #10
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    Quote Originally Posted by saddle tramp View Post
    Min, max itís all the same
    There are no facts, just opinions. Or at least that's what certain politicians tell me.

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