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Essential tool for saving money by replacing your chain before your chain rings and cassette are worn too! Read more..
Drop in chain checker advises you when it's time to change the chain - if your wear is above 0.5 (10, 11-speed) or 0.75 (7/8/9-speed) it's time for a new chain! You can run single speed or IGH chains to ~1.0 wear.
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