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    Front Derailleur won’t fully shift outward

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    10 Comments

    1. Junk-Miles on

      And I just realized the angle is weird but no, it is not hitting the chainring teeth. It’s just the angle. I can manually push it outwards over the big chainring but it won’t do it itself.

    3. jarvischrist on

      Does it go all the way out if you move it manually with your hand? If yes, could be not enough cable tension.

      If it doesn’t then try bumping out the high limit screw, then readjusting the cable tension.

    5. auxym on

      https://youtu.be/ZNG7g83lI-s?si=QpsqWHV7Ds_SihXH

      Edit: it’s a Park Tool video featuring the Legend Calvin Jones. It will walk you through a full adjustment of the front derailleur. I could tell you to just adjust the high limit screw, but if something else is off like the angle or height of the derailleur it won’t help you much. Just follow the video and you’ll get a fully tuned FD.

    8. Johnny12679 on

      Bad News, that derailleur is very likely toast. There’s a gear box in the 12 sp Di2 front derailleurs that sits in a (too soft) bushing. When it wears out, this happens. Shimano does not offer spare parts for this generation.

      I have a small business specialised in repairing Di2 parts and got some bushings custom made. If you are interested send me a message. I’m in the Netherlands.

      https://preview.redd.it/2r4g7qa22q3f1.png?width=1080&format=png&auto=webp&s=03dcbdfd64bb00679a4f4764fbfbba873ad77374

      Here’s a Dura Ace derailleur that had the same issue. Defective bushing is circled.

    9. squirlybumrush on

      Is this a new system or did something change while riding/transporting?
      It may not shift if you aren’t pedaling, so do that first.
      I would make sure there’s enough clearance (3mm) between the top of the chainring and the derailleur. Check the set screws, make sure they are adjusted properly to allow the derailleur to move all the way out.

      Edit:
      I just saw your comment below.
      I would still check the things I mentioned but if you can push it manually then it could be the mechanism inside is damaged, maybe it got forced?

    10. karlzhao314 on

      Did you actually try adjusting it? I’m not sure if I’ve ever seen a derailleur *that* far off and I’m not sure if the electronic indexing adjustment is going to be enough to take care of it, but if you haven’t tried it yet that would be the first thing to do.

      [RAFD010 | Manuals & Technical Documents](https://si.shimano.com/en/dm/RAFD010/adjust_front_derailleur)

      Procedure is here.

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