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Old 10-18-2011, 08:05 PM
cpgorm121
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I waited until 80k to change mine. The chain had worn completely through the plastic and was hitting the metal underneath. The metal looks pretty hard. There was no visible damage to the chain. It was still making a whining noise when I took it apart. I would guess that you would.have to chew up the chain before it would fail. I would expect that to make a lot more noise before it failed.
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