Road Cycling · Public discussion

Computer Calibration Question

Started by Birke D · · Last activity · 6 posts · 1,261 views

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Road Cycling
Published
3 May 2003
Last activity
4 May 2003
Original author
Birke D
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6
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  1. The distance measurement readout on my bike computer is close, but slightly less than true distance
    traveled. For example, if I rode 10 miles, the computer reading would only be 9.8 miles. The tires
    are fully inflated so it's a question of the computer setting. Before I really screw up the
    settings, do I need to increase or decrease the computer wheel size reference number? Thanks in
    advance for your advice.

  2. "Birke D" <[email hidden]> wrote in message "]news:[email hidden]...

    Quoted message said:

    The distance measurement readout on my bike computer is close, but


    slightly

    Quoted message said:

    less than true distance traveled. For example, if I rode 10 miles, the


    computer

    Quoted message said:

    reading would only be 9.8 miles. The tires are fully inflated so it's a question of the computer
    setting. Before I really screw up the settings,


    do I

    Quoted message said:

    need to increase or decrease the computer wheel size reference number?


    Thanks

    Quoted message said:

    in advance for your advice.

    Increase.

  3. How do you know your cycle-computer isn't correct? What are you measuring the supposed 10 mile
    distance with?

    Chris

    Birke D said:

    The distance measurement readout on my bike computer is close, but slightly less than true
    distance traveled. For example, if I rode 10 miles, the computer reading would only be 9.8 miles.
    The tires are fully inflated so it's a question of the computer setting. Before I really screw up
    the settings, do I need to increase or decrease the computer wheel size reference number? Thanks
    in advance for your advice.

  4. Quoted message said:

    The distance measurement readout on my bike computer is close, but slightly

    Quoted message said:

    less than true distance traveled. For example, if I rode 10 miles, the


    computer

    Quoted message said:

    reading would only be 9.8 miles.

    That was just a hypothetical example used to clarify my inquiry. I've done many rides over different
    measured distances and I always come up a little short on my computer.

  5. (Birke D) said:

    The distance measurement readout on my bike computer is close, but slightly less than true
    distance traveled. For example, if I rode 10 miles, the computer reading would only be 9.8 miles.
    The tires are fully inflated so it's a question of the computer setting. Before I really screw up
    the settings, do I need to increase or decrease the computer wheel size reference number? Thanks
    in advance for your advice.

    Increase, by appr. 2%, probably around 4cm.

    --
    __o | Øyvind Røtvold _`\(, | darkside.noindex.html (_)/(_) | ... biciclare
    necesse est ...

  6. In article said:
    Quoted message said:

    The distance measurement readout on my bike computer is close, but slightly

    Quoted message said:

    less than true distance traveled. For example, if I rode 10 miles, the


    computer

    Quoted message said:

    reading would only be 9.8 miles.

    That was just a hypothetical example used to clarify my inquiry. I've done many rides over
    different measured distances and I always come up a little short on my computer.

    How do you know the *real* distance? Bicycle computer's can be very accurate.

    --
    --
    LITTLE KNOWN FACT: Did you know that 90% of North Americans cannot taste the difference between
    fried dog and fried cat?

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