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Old 07-12-17, 11:40 PM
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catgita
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Bikes: Fitz randonneuse, Trek Superfly/AL, Tsunami SS, Bacchetta, HPV Speed Machine, Rans Screamer

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That is some crazy wear for 4000 miles! I would be looking for bad bearings or something. Poor shifting would affect the top pulley, not the bottom. I hope that is not a professionally clean chain. Nasty abrasive trail dust? Try a dry chain lube.
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