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Rebuilding on the cheap...

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01 / Original postRebuilding on the cheap...Email address hidden · 24 Jul 2005 02 / This pagePosts 1–7Page 1 of 1 · chronological order 03 / Latest replyPost #7Email address hidden · 25 Jul 2005

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Cycling Equipment
Published
24 July 2005
Last activity
25 July 2005
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Email address hidden
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7
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Public discussion
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Front derailleurs

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  1. Original post
    Email address hidden
    Archived post
    #1

    I have a MTB project I'm doing in which I am trying to use what spares
    are in my parts box, existing bike parts and trying to do everything as
    simply and cheaply as possible.

    With that background, here we go:

    I have an old LX triple Biopace crankset, 48-38-28. I have a newer
    FD-M580 LX front derailleur. Now, the learned among you will know what
    my problem is immediately, but to you others, I have a problem that
    needs solving. Seems that a ten-tooth spacing is no good with this FD,
    as the inner cage hangs on the middle chainring when the thing is
    mounted the proper distance away from the big ring's tallest teeth
    (Biopace, the added complication)

    Supposedly, I need twelve-tooth spacing from big-to-middle. My idea
    was to spend some small amount of money and purchase a Sugino 36-tooth
    middle ring. Please, you gurus out there - will this be the easy
    fix-it I'm praying for?

    Thanks,

    E.P.

    Report
  2. Email address hidden
    Archived post
    #2

    Or...

    Purchase a 110 BCD 50t big ring???

    I guess the real tech question is - will a twelve-tooth difference in
    the big/middle ring allow the use of the LX FD I have?

    Thanks again,

    E.P.

    Report
  3. A Muzi
    Archived post
    #3
    Quoted message said:

    I have a MTB project I'm doing in which I am trying to use what spares
    are in my parts box, existing bike parts and trying to do everything as
    simply and cheaply as possible.

    With that background, here we go:

    I have an old LX triple Biopace crankset, 48-38-28. I have a newer
    FD-M580 LX front derailleur. Now, the learned among you will know what
    my problem is immediately, but to you others, I have a problem that
    needs solving. Seems that a ten-tooth spacing is no good with this FD,
    as the inner cage hangs on the middle chainring when the thing is
    mounted the proper distance away from the big ring's tallest teeth
    (Biopace, the added complication)

    Supposedly, I need twelve-tooth spacing from big-to-middle. My idea
    was to spend some small amount of money and purchase a Sugino 36-tooth
    middle ring. Please, you gurus out there - will this be the easy
    fix-it I'm praying for?

    I would try raising the front changer enough to clear first.
    If you are unhappy with the shift response then try a new
    ring.

    --
    Andrew Muzi
    www.yellowjersey.org
    Open every day since 1 April, 1971

    Report
  4. Email address hidden
    Archived post
    #4
    A Muzi said:
    Quoted message said:

    I have a MTB project I'm doing in which I am trying to use what spares
    are in my parts box, existing bike parts and trying to do everything as
    simply and cheaply as possible.

    With that background, here we go:

    I have an old LX triple Biopace crankset, 48-38-28. I have a newer
    FD-M580 LX front derailleur. Now, the learned among you will know what
    my problem is immediately, but to you others, I have a problem that
    needs solving. Seems that a ten-tooth spacing is no good with this FD,
    as the inner cage hangs on the middle chainring when the thing is
    mounted the proper distance away from the big ring's tallest teeth
    (Biopace, the added complication)

    Supposedly, I need twelve-tooth spacing from big-to-middle. My idea
    was to spend some small amount of money and purchase a Sugino 36-tooth
    middle ring. Please, you gurus out there - will this be the easy
    fix-it I'm praying for?

    I would try raising the front changer enough to clear first.
    If you are unhappy with the shift response then try a new
    ring.

    Yeah, I did that. Shifted like "poo". Worse than poo, really.
    Shifting to the larger from smaller rings sucked pretty bad, but
    shifting from bigger to smaller sucked really, really bad. And yes,
    those are precise, technical terms. 😉

    Thanks for the tip - I'm kinda sorry it wasn't that easy.

    E.P.

    Report
  5. Email address hidden
    Archived post
    #5
    A Muzi said:
    Quoted message said:

    I have a MTB project I'm doing in which I am trying to use what spares
    are in my parts box, existing bike parts and trying to do everything as
    simply and cheaply as possible.

    With that background, here we go:

    I have an old LX triple Biopace crankset, 48-38-28. I have a newer
    FD-M580 LX front derailleur. Now, the learned among you will know what
    my problem is immediately, but to you others, I have a problem that
    needs solving. Seems that a ten-tooth spacing is no good with this FD,
    as the inner cage hangs on the middle chainring when the thing is
    mounted the proper distance away from the big ring's tallest teeth
    (Biopace, the added complication)

    Supposedly, I need twelve-tooth spacing from big-to-middle. My idea
    was to spend some small amount of money and purchase a Sugino 36-tooth
    middle ring. Please, you gurus out there - will this be the easy
    fix-it I'm praying for?

    I would try raising the front changer enough to clear first.
    If you are unhappy with the shift response then try a new
    ring.

    Yeah, I did that. Shifted like "poo". Worse than poo, really.
    Shifting to the larger from smaller rings sucked pretty bad, but
    shifting from bigger to smaller sucked really, really bad. And yes,
    those are precise, technical terms. 😉

    Thanks for the tip - I'm kinda sorry it wasn't that easy.

    E.P.

    Report
  6. Email address hidden
    Archived post
    #6
    A Muzi said:
    Quoted message said:

    I have a MTB project I'm doing in which I am trying to use what spares
    are in my parts box, existing bike parts and trying to do everything as
    simply and cheaply as possible.

    With that background, here we go:

    I have an old LX triple Biopace crankset, 48-38-28. I have a newer
    FD-M580 LX front derailleur. Now, the learned among you will know what
    my problem is immediately, but to you others, I have a problem that
    needs solving. Seems that a ten-tooth spacing is no good with this FD,
    as the inner cage hangs on the middle chainring when the thing is
    mounted the proper distance away from the big ring's tallest teeth
    (Biopace, the added complication)

    Supposedly, I need twelve-tooth spacing from big-to-middle. My idea
    was to spend some small amount of money and purchase a Sugino 36-tooth
    middle ring. Please, you gurus out there - will this be the easy
    fix-it I'm praying for?

    I would try raising the front changer enough to clear first.
    If you are unhappy with the shift response then try a new
    ring.

    Yeah, I did that. Shifted like "poo". Worse than poo, really.
    Shifting to the larger from smaller rings sucked pretty bad, but
    shifting from bigger to smaller sucked really, really bad. And yes,
    those are precise, technical terms. 😉

    Thanks for the tip - I'm kinda sorry it wasn't that easy.

    E.P.

    Report
  7. Email address hidden
    Archived post
    #7
    A Muzi said:
    Quoted message said:

    I have a MTB project I'm doing in which I am trying to use what spares
    are in my parts box, existing bike parts and trying to do everything as
    simply and cheaply as possible.

    With that background, here we go:

    I have an old LX triple Biopace crankset, 48-38-28. I have a newer
    FD-M580 LX front derailleur. Now, the learned among you will know what
    my problem is immediately, but to you others, I have a problem that
    needs solving. Seems that a ten-tooth spacing is no good with this FD,
    as the inner cage hangs on the middle chainring when the thing is
    mounted the proper distance away from the big ring's tallest teeth
    (Biopace, the added complication)

    Supposedly, I need twelve-tooth spacing from big-to-middle. My idea
    was to spend some small amount of money and purchase a Sugino 36-tooth
    middle ring. Please, you gurus out there - will this be the easy
    fix-it I'm praying for?

    I would try raising the front changer enough to clear first.
    If you are unhappy with the shift response then try a new
    ring.

    Yeah, I did that. Shifted like "poo". Worse than poo, really.
    Shifting to the larger from smaller rings sucked pretty bad, but
    shifting from bigger to smaller sucked really, really bad. And yes,
    those are precise, technical terms. 😉

    Thanks for the tip - I'm kinda sorry it wasn't that easy.

    E.P.

    Report

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