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Front derailleur issue

Cubsfan2112Cubsfan2112 Posts: 7
edited August 2018 in Road general
My front derailleur will not stay in the top chainring when I shift. It will go in the top chainring and then immediately fall back into the lower chainring. Please help. Thanks.

Posts

  • gethincerigethinceri Posts: 1,148
    Cable tension.
  • trekvettrekvet Posts: 220
    Could be above or H screw.
    Work through this? https://www.parktool.com/blog/repair-he ... adjustment
    The Wife complained for months about the empty pot of bike oil on the hall stand; so I replaced it with a full one.
  • imafatmanimafatman Posts: 351
    After a lot of thought I've come to the same conclusion, your front derailleur needs adjusting.
  • jgsijgsi Posts: 5,027
    Might even be not enough cable tension... bike fettling hey,, wonderful hobby
  • keef66keef66 Posts: 13,123
    Cable tension, H limit screw, cable fraying inside the shifter, broken shifter.

    If it used to work and you haven't adjusted the limit screws then cable tension is the most likely culprit.

    Does the shifter click when you shift up to the big ring?
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