• The other causes are bend in your outer cables that are too tight or other causes of excess friction.

    To set up you gears.
    1) drop in the smallest cog
    2) undo the anchor bolt and ensure your shifter has no clicks to go.
    3) Ensure the the top jockey wheel is the middle of the smallest. Ajudt the limit screw if it isn't
    4) pull the cable taught and anchor
    5) use the shifter to shift up one gear and down shift
    6) if 5) does not happen then use the barrel adjuster. Turning it out adds tension and will help it shift up. Turning releases cable tensions and aids the down shift.
    Once you have it going the first two cogs cleanly the others will be right too. You could be done in two minutes.

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