Head Tube Length?
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  1. #1
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    Head Tube Length?

    Regarding frame dimensions, if the head tube length is increased by 2-3cm, and top tube length does not change, will the reach from the saddle to the handlebar be reduced, or stay the same?

  2. #2
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    Are your bars being elevated the same amount?... If so, reach will be shorter..

    Whether you increase the head tube or increase the height stem, your effective TT will decrease
    Dave Hickey/ Fort Worth

    My 3Rensho Blog: http://vintage3rensholove.blogspot.com/

  3. #3
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    Yes. Thanks.

  4. #4
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    the amount...

    Quote Originally Posted by bicicletă
    Yes. Thanks.
    Raising the bars with spacers or a taller head tube moves the bar about 3mm closer for each 10mm of height.

  5. #5
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    Yes, reach is reduced if handlebars are higher. The higher the handlebars, the shorter the reach -- which is why you can sometimes get away with riding larger frames if you raise your handlebars.

  6. #6
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    Quote Originally Posted by bicicletă
    Regarding frame dimensions, if the head tube length is increased by 2-3cm, and top tube length does not change, will the reach from the saddle to the handlebar be reduced, or stay the same?
    One thing to beware of, if you are comparing different brands / models, is the type of headset used. Going from a conventional to an integrated headset will eat up most of that distance. Just saying, make sure it's an even-up comparison of head tube length.

    One other thing to consider is that by one view, the answer is 'none.' What I mean is, regardless of headtube length, you ought to be putting your bars in the same position. In that sense, it doesn't matter at all (wrt dimensions) if you use spacers or head tube to get a particular distance between crown race and stem clamp.

    If the distance is such that you have to factor in flipping stems, things get a bit trickier to figure. Here's a chart that might be useful:
    http://www.habcycles.com/fitting.html
    A good habit is as hard to break as a bad one..

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