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  1. #1
    Mixitup
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    Oct 2005
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    Shifting setup Help

    I decided that I would try SIS shifting on my older Road Bike.
    I replaced the 6 speed FW with a 7 speed FW 12-28, got a set of downtube 7 speed shimano SIS shifters on E-bay. I took a fairly new SORA derailer off of another bike (the Sora was not rated for a 32 tooth FW anyway)

    I can get the low to high shifting to work fine but cannot get the high to low to index properly. It takes two clicks to get off the 28T. If I adjust for high to low it wont shift up on the first click and clatters.

    The Chain is the same one. The 6 speed suntour had a 28 tooth high gear.

    Could it be the Chain?
    Blending Bikes

  2. #2
    Senior Member
    Join Date
    Aug 2005
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    Pittsburgh, PA
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    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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    Could be the chain if you have an old, wide 6-speed chain but it also could be that the rear derailleur limit screws aren't adjusted properly. Adjust them with the rd cable disconnected, then set up the shifting.

  3. #3
    Senior Member Steev's Avatar
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    Jul 2005
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    Check the condition of the cable between the chainstay and the derailleur. If that's sticking you'll get a similar problem.

  4. #4
    Mixitup
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    Chain Chart?

    I will double check the Cable. I will probably just replace it tonight.
    The Chain is an older style six speed chain. I will be at the bike shop so I will also get a chain

    I have searched for some kind of a Chain Chart showing the different dimensions but come up empty.
    Is 7 & 8 speed chain different? I assume so
    How about 6-7 speed chain. I suspect they are but am wary of labeling for marketing purposes and some of the LBS guys dont always know slightly older technology
    Blending Bikes

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