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Thread: handlebar size

  1. #1
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    handlebar size

    where do I measure the bar to determine the size to match it up with a stem?

  2. #2
    black betty DeadSailor's Avatar
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    im not even sure, but id assume its the circumference of the bar at there the stem clamps on

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    thats what I was thinking also. seems a bit obvious. just figured I'd ask to be sure

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    me have long head tube TallRider's Avatar
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    I assume you're talking about handlebar clamp diameter - not the circumference. You can measure, but as DeadSailor said the measurement is often stamped on the bar and on the stem (sounds like you're starting out with the bar).

    But here's the most common sizes:
    25.4mm - nearly all flat bars, older or cheaper drop bars
    26.0mm - most better-quality road bars
    31.8mm - newer "oversize" for both road and mountain bars

    Others: older Cinelli drop bars are often 26.4mm. Moustache bars may come in either 26.0 or 25.4, as do bullhorn bars (though most bullhorns are 26.0).

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