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  1. #1
    Senior Member Capecodder's Avatar
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    What does this screw do?

    This might be a dumb question, but what is this screw for? It is on the outside of the outter ring? If it were on the inside I would expect it to help the chan from the inner ring to the outter when shifting....

    Amy, I'll always remember you...... I miss you so much, for you filled my days with so much joy.

  2. #2
    Senior Member rootboy's Avatar
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    It might be reversed in its mounting hole. On the Campy ring, I always thought it was there to keep the chain from jamming down between the big and small rings. One of those safety things they forced Campy to add in, what, the mid 70's?

  3. #3
    Senior Member gearbasher's Avatar
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    It goes behind the crank arm. It keeps the chain from jamming between the chainring and crankarm, in case of an overshift.
    "Trying is the first step towards failure." --- Homer Simpson

  4. #4
    Bianchi Goddess Bianchigirll's Avatar
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    I agree it looks like a homemade replacement pin
    Bianchis '87 Sport SX, '90 Proto, '90 Campione del Fausto Giamondi Specialisma Italiano Mundo, '91 Boarala 'cross, '93 Project 3, '86 Volpe, '97 Ti Megatube, , '90 something Vento 603,

    Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '09 Motobecane SS, '?? Jane Doe (still on the drawing board), '90ish Haro Escape

  5. #5
    my name is Jim BlueDevil63's Avatar
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    Quote Originally Posted by gearbasher View Post
    It goes behind the crank arm. It keeps the chain from jamming between the chainring and crankarm, in case of an overshift.
    +1

  6. #6
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    Is there just one or do they go all the way around? If all around, I'd suggest a guard was bolted on.

  7. #7
    Senior Member ColonelJLloyd's Avatar
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    Quote Originally Posted by gearbasher View Post
    It goes behind the crank arm. It keeps the chain from jamming between the chainring and crankarm, in case of an overshift.
    +2
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  8. #8
    Senior Member michael k's Avatar
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    Adjustment screw...use it to realign the solar matrix of the chainring for maximum endothermic propulsion!

  9. #9
    Oh Snap, not again... atmdad's Avatar
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    Quote Originally Posted by michael k View Post
    Adjustment screw...use it to realign the solar matrix of the chainring for maximum endothermic propulsion!
    Obsolete, remove it and go with an after market flux capacitor.

  10. #10
    Senior Member rootboy's Avatar
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    Quote Originally Posted by gearbasher View Post
    It goes behind the crank arm. It keeps the chain from jamming between the chainring and crankarm, in case of an overshift.
    yeah ...that's what I meant to say.

  11. #11
    Senior Member jeepr's Avatar
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    "What does this screw do?"


    In it's current location, nothing except create interesting conversations.

  12. #12
    Senior Member rootboy's Avatar
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    If that is the outboard side of the chainring, that is in the proper position.
    Isn't it?

  13. #13
    Senior Member Capecodder's Avatar
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    Quote Originally Posted by rootboy View Post
    If that is the outboard side of the chainring, that is in the proper position.
    Isn't it?
    Yes.
    Amy, I'll always remember you...... I miss you so much, for you filled my days with so much joy.

  14. #14
    Senior Member rootboy's Avatar
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    I'm trying to guess what brand that ring is. Stronglight?

  15. #15
    Crawlin' up, flyin' down bikingshearer's Avatar
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    Quote Originally Posted by jeepr View Post
    "What does this screw do?"


    In it's current location, nothing except create interesting conversations.
    It might also cause interesting nicks and abrasions to one's socks and/or ankles.
    "I'm in shape -- round is a shape." Andy Rooney

  16. #16
    Senior Member larwyn's Avatar
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    Turning the screw will adjust the distance which it protudes from the chainring on both sides. Clockwise or anticlockwise, depending on where you are standing....................
    Larry

    It is truly amazing how intelligent we think a person is when he agrees with us.

  17. #17
    Senior Member rootboy's Avatar
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    Quote Originally Posted by bikingshearer View Post
    It might also cause interesting nicks and abrasions to one's socks and/or ankles.
    only if they get between the crank arm and the ring

  18. #18
    Senior Member Capecodder's Avatar
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    Quote Originally Posted by rootboy View Post
    I'm trying to guess what brand that ring is. Stronglight?
    Pretty darn good guess
    Amy, I'll always remember you...... I miss you so much, for you filled my days with so much joy.

  19. #19
    Senior Member rootboy's Avatar
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    I think I have one downstairs. I remembered the screw head. I have a Campy spare with that pin too, but it is fixed, not removable, as I remember.

  20. #20
    Senior Member Grand Bois's Avatar
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    It's a ring for a Stronglight 93. It's mounted correctly and is an original part, not home made. The CPSC has nothing to do with it.

    The Campy version is also removeable.

  21. #21
    Old fart JohnDThompson's Avatar
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    Quote Originally Posted by rootboy View Post
    I'm trying to guess what brand that ring is. Stronglight?
    That's what I'd guess as well.

    That looks like an OEM Stronglight chain-drop pin.

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