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  1. Info:

    Shimano 105 11SP, 11-30 Cassette

    Derailleur has been squeaking for a few days, so I took the jockey wheels out and de-greased / re-greased them. However, I still get this very high-pitched (almost mouse-like) squeaking noise; even under load up and down my road.

    Even before then, chain was completely stripped of grease and re-lubed; squeak remained.

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