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    WTF have I done to my bike – skipping gears and clicking rear derailleur


    Put my bike onto the trainer as I have done before. Noticed it clicking and shifting like rubbish. Decided to go for an actual ride and put the wheel back on but the gears and jumping and the derailleur is clicking. Videos show the worst of it.
    Have I bent the rear derailleur?
    Do I need to index it?

    Please help. I haven’t changed anything else on the set up and everything is charged.

    WTF have I done to my bike – skipping gears and clicking rear derailleur
    byu/RookieRunner91 inbikewrench



    by RookieRunner91

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    9 Comments

    1. FoodPractical1117 on

      Likely need to re-index the gears. Check out videos on how to do that on YouTube. If that doesn’t work, then the derailleur may be out of alignment and needs to be adjusted

    2. soarky325 on

      Have you checked your derailleur hanger to see if it is bent? That could cause this type of issue.

      Derailleur hangers are design to bend or fail when you make an impact with something in order to save the derailleur itself. They are designed to break and be replaced but there are over 1,000 different kinds. You can Google it or stop by an LBS to identify it. They’re cheap so buy a couple of spares.

    4. mmlow on

      You have a DI2 derailleur, adjustment really shouldn’t change unless you bent something, probably the hanger.

    5. teabagalomaniac on

      Either the cables between your shifters and your derailleur have stretched a bit, which is totally normal, and you need to re-index the gears; or you’ve banged the rear derailleur on something and bent your derailleur hanger. The former you can fix yourself, the latter you’ll need a guy at a bike shop with a big bender bar to corral it back into alignment for you.

    6. Checked_Out_6 on

      When putting the bike on/off the trainer, did you drop it on the derailleur? I have done that before, more than once, even while telling myself “don’t drop it on the derailleur.” Might need a simple tuning. Might need to straighten the hanger. Possibly could need a new hanger. Remember the hanger is there to take the damage instead of the derailleur.

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