New handlebar for threaded headset

Discussion in 'Cycling Equipment' started by Craig, Feb 28, 2004.

  1. Craig

    Craig Guest

    I have a 1999 5200 trek I need to replace the handle bars.

    Do I have to worry about avoiding bars that have to big of a circumference for the stem coupler?

    I've looked at the ITM Millennium online but as fas as I can tell this dimension is not mentioned.

    I measured my existing handle bars circumference at the mount point to be
    8.5 cm

    thank you craig
     
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  2. Ted Bennett

    Ted Bennett Guest

    > I have a 1999 5200 trek I need to replace the handle bars.
    >
    > Do I have to worry about avoiding bars that have to big of a circumference for the stem coupler?
    >
    > I've looked at the ITM Millennium online but as fas as I can tell this dimension is not mentioned.
    >
    > I measured my existing handle bars circumference at the mount point to be
    > 8.5 cm
    >
    > thank you craig

    All is revealed at http://www.sheldonbrown.com/gloss_h.html#handlebarstem

    --
    Ted Bennett Portland OR
     
  3. cycleboy

    cycleboy Guest

    Important dimension is diameter not circumference. Dividing your measurement by 3.14 (pi) gives 27.1. Normal 26.0 would have a diameter of 8.2 cm and oversized 31.8 would have a diamenter of 9.9 cm Generally, common sizes 25.8, 26.0 are interchangeable. New bars (oversized) are 31.8 and most have a noticeable bulge in the center. Needless to say these will not fit in older stems.
     
  4. Craig

    Craig Guest

    > Important dimension is diameter not circumference. Dividing your measurement by 3.14 (pi) gives
    > 27.1. Normal 26.0 would have a diameter of 8.2 cm and oversized 31.8 would have a diamenter of 9.9
    > cm Generally, common sizes 25.8, 26.0 are interchangeable. New bars (oversized) are
    > 31.8 and most have a noticeable bulge in the center. Needless to say these will not fit in older
    > stems.

    excellent info you gave me. I must have been off by 2 mm with the tape I was using. So I got a 26 mm
    dia. Nuts I would have liked to try an oversize bar. I wonder if I could find a old style stem with
    the 31.8 dia, probably not. I guess treadless is lighter but not enough for me to care.

    thanks
     
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