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  1. #1
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    front derailleur

    I have a Santana tandem with a shimano derailleur and ultrgra shifter. When I am on the large sprocket and want to go to the middle it will fall to the small and I will have to come back up to the middle. What adjustment would take care of this problem? Could there be a problem in the shifter?

  2. #2
    Senior Member onbike 1939's Avatar
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    You may find that the "H" screw needs backing off a bit. It may change to the large chain-ring but because this requires too much tension on the cable, when moved to the middle it will spring back further than the middle and go to the small chain-ring.
    If this doesn't work then clean and lube the FD, making sure it moves smoothly over its whole range of travel.

  3. #3
    cab horn
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    Quote Originally Posted by workout View Post
    I have a Santana tandem with a shimano derailleur and ultrgra shifter. When I am on the large sprocket and want to go to the middle it will fall to the small and I will have to come back up to the middle. What adjustment would take care of this problem? Could there be a problem in the shifter?
    Do the whole procedure

    http://www.parktool.com/repair/readhowto.asp?id=75

    I'm going to assume you're talking about the front chainrings about this problem.
    Last edited by operator; 09-21-08 at 07:51 AM.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

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