When should you replace your bike chain?

Like it or not, bike chains ?stretch? over time. Only by a small amount, but multiply that by the number of times each link passes over your chainrings, cassette and jockey wheels and you?ll quickly wear them out, if you don?t regularly replace your chain. A worn chain ultimately leads to the most common mechanical [...]

Source: http://www.londoncyclist.co.uk/when-should-you-replace-your-bike-chain/

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