• Afaik manufacturers do not encourage splitting and reusing chain links. The links aren’t intended for multiple openings and closings and the snapping into position gets weaker. When pedalling the chain is in tension helping to pull the link shut, but offroad the chain is slack more often possibly enabling the link to open up unexpectedly.

    Is the manufacturer guidance overkill?

  • Overkill or not overkill... if you're in doubt just chuck it and use a new split link.

  • It’s probably very anecdotal but have you ever heard of a split link opening itself up? I’ve not.

  • It's only some of the >=11 speed ones that advertised as not reusable. And even then not all manufacturers.

    The ridges of metal that hold the pins are pretty tiny. I suspect once worn they'd pop open sideways rather than lengthways. The chain going slack doesn't exert much force.

  • KMC makes 2 types of 11 speed quick links. One is re-usable, the other isn't. It says 're-usable' or 'not re-usable' on the packaging. Such as this .

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