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  1. #1
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    Gears shift ok on stand but not on road.

    Previously posted in wrong section.

    I have a Shimano Altus 9 speed rear. With the bike inverted I have set the limits and indexing and it works fine. When on the road it sometimes misses a cog going up the cassette and also down. I have replace the inner and outer cables but no change. With the "B" screw fully retracted there still seems to be about 15mm gap between the largest cog and the jockey wheel. Any advice would be appreciated. Thanks Keith

  2. #2
    'brifter' is a lame word.
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    Quote Originally Posted by keithjohn View Post
    Previously posted in wrong section.

    I have a Shimano Altus 9 speed rear. With the bike inverted I have set the limits and indexing and it works fine. When on the road it sometimes misses a cog going up the cassette and also down. I have replace the inner and outer cables but no change. With the "B" screw fully retracted there still seems to be about 15mm gap between the largest cog and the jockey wheel. Any advice would be appreciated. Thanks Keith
    Hanger properly aligned? New chain/old cassette? When are you checking the 15mm gap? It should be small ring/large cog. I'm guessing that you've got the bike upside down because you don't have a work stand? If ou replaced the cables/housing that could still be the problem if you didn't open up the housing liner or have any kinks in the cable where it runs through housing. This is less likely if it works when not being ridden. I'd have to guess some mis-match of wear in the drivetrain.
    Thanks for posting in the correct forum.
    I work for some bike racers
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  3. #3
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    Hanger looks ok although I haven't checked it with an alignment tool. Old chain/new cassette. Checked 15mm gap with large ring / large cog. will re-check as you say. Cable seemed to run free free when installing. Yes bike upside down as I don't have a bike stand.

    Thanks for suggestions.

  4. #4
    'brifter' is a lame word.
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    Quote Originally Posted by keithjohn View Post
    Hanger looks ok although I haven't checked it with an alignment tool. Old chain/new cassette. Checked 15mm gap with large ring / large cog. will re-check as you say. Cable seemed to run free free when installing. Yes bike upside down as I don't have a bike stand.

    Thanks for suggestions.
    Most likely the old chain/new cassette.
    I work for some bike racers
    I've got some bikes, some guns,
    and a bunch of skateboards

  5. #5
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    Because there is a difference between load and no load. While something may work under no load, when you apply load, there are subtle changes. Make your adjustments then ride the bike, rinse and repeat till everything runs smoothly

  6. #6
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    Quote Originally Posted by cxwrench View Post
    Most likely the old chain/new cassette.
    Magic 8 Ball says: "yes"

  7. #7
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    Quote Originally Posted by Kerry Irons View Post
    Magic 8 Ball says: "yes"
    Nothing magic here. Unequivocal "yes".
    "With bicycles in particular, you need to separate between what's merely true and what's important."-- DCGriz, RBR.

    “Statistics are like bikinis. What they reveal is suggestive, but what they conceal is vital.” -- Aaron Levenstein



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