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  • What would be causing my drivetrain (Shimano 105 5800) to squeak loudly in all the gears?

    Happens when pedalling, both sitting and standing. Stops when not pedalling.

  • Have you cleaned it? Always a good start.

    If it's happening in all gears then I'd suspect the jockey wheels need looking at.

  • jockey wheels

    I'd suggest chain is more likely than jockey wheels, particularly with plastic wheels running on bushings as 5800 has.

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