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A worn chain leads to poorer gear shifting and faster wear of the sprockets. The Park Tool CC-3.2 tool measures whether the chain has stretched from 0.5 to 0.75%, the point at which most makers recommend replacement.
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A worn chain leads to poorer gear shifting and faster wear of the sprockets. The Park Tool CC-3.2 tool measures whether the chain has stretched between 0.5% and 0.75%, the point at which most manufacturers recommend replacement.