Road Cycling · Public discussion

Re: 68x10

Started by Carl Sundquist · · Last activity · 2 posts · 482 views

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Road Cycling
Published
24 August 2004
Last activity
29 August 2004
Original author
Carl Sundquist
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2
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  1. "Carl Sundquist" <[email hidden]> wrote in message news:...

    Quoted message said:


    Quoted message said:


    I know what you mean. The chordal action aspect is governed by teeth


    number,

    Quoted message said:

    not chain pitch. IOW, a 10 mm pitch 9t cog would suffer just as much


    from

    Quoted message said:
    Quoted message said:

    chordal action as a 1/2 inch pitch 9t cog. The teeth and chain are


    "discrete"

    Quoted message said:

    -- the chain forms "chords" across the circumference of the cog, and too


    few

    Quoted message said:

    chords (low teeth number) can allow the chords to be sensed.


    BTW, though I knew of the fact that "bigger is better", I didn't break it
    down into the actual reasons why, nor was I familiar with the term 'chordal
    action'. Thank you for a clear, concise explanation.

  2. Very interesting discussion folks, unfortunately I can't contribute
    more than my awe. Are you guys mech engineers or what ?

    "Carl Sundquist" <[email hidden]> wrote in message news:<[email hidden]>...

    Quoted message said:

    "Carl Sundquist" <[email hidden]> wrote in message news:...

    Quoted message said:


    Quoted message said:


    I know what you mean. The chordal action aspect is governed by teeth


    number,

    Quoted message said:
    Quoted message said:

    not chain pitch. IOW, a 10 mm pitch 9t cog would suffer just as much


    from

    Quoted message said:
    Quoted message said:

    chordal action as a 1/2 inch pitch 9t cog. The teeth and chain are


    "discrete"

    Quoted message said:
    Quoted message said:

    -- the chain forms "chords" across the circumference of the cog, and too


    few

    Quoted message said:
    Quoted message said:

    chords (low teeth number) can allow the chords to be sensed.


    BTW, though I knew of the fact that "bigger is better", I didn't break it
    down into the actual reasons why, nor was I familiar with the term 'chordal
    action'. Thank you for a clear, concise explanation.

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