Do you need to replace your bike chain? I show you how to measure the wear on your bike chain. It's very easy and important to do. If your chain is worn to a certain point, it is important to replace your chain. If you don't then it will start wearing out your cassette/freewheel and chain rings and then you will have to replace your whole drive train which will be much more expensive. You will want to check your chain periodically. If you ride in dirt and mud, then you will want to check it more often. The tool I used in the video is the Park Tools Chain Wear Indicator and it's model # is CC3. They have a newer longer version of it with model # CC3.2.

Here is the tool on Amazon:
http://www.amazon.com/exec/obidos/ASI...

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