In order for you to be able to fix a broken bike chain, you will need one or both of the following:
A chain splitter (sometimes just called a chain tool) is needed where a standard chain link needs to be removed. It is used to push the link pin out of the link, which detaches the chain link in question. The Quick or Speed link pliers aren't necessarily essential, however they can make removal and reinstallation of a quick link a lot easier.
How to remove a bike chain
To remove a bike chain with standard links I.E. no quick/speed link, you will need a chain splitter. Place the chain into the splitter as shown below, lining up the chain link pin with the tool. Twist the handle until the pin is almost all of the way out, but don't push it out completely. You should be able to now gently bend open the link and separate the two ends of the chain.
To remove a quick link it is best to use some quick link pliers, and simply press the two parts of the link towards each other and the link should separate.
Once the chain has been removed, you can fix it easily by putting a quick link in, or you can close the chain by again using the chain splitter. If this is the case, position the chain in the splitter with the tool set to press the pin back in. Wind the handle in until the pin is in place through the link. If the link is a bit stiff, try moving the links a little to free them off. If this still doesn't work, use the chain splitter to very gently push the pin back the way it went in, just a fraction. Please note that some chains are not designed to be rejoined in this manner and only a quick link should be used. Also bear in mind that the chain will likely be shorter than it used to be, so ensure that the larger sprockets can be reached without causing damage to the rear derailleur.
How to replace a bike chain
If you are looking to replace the bike chain, then remove the old one using the method above first. Once the old chain is removed, use the chain splitter to alter the chain to the correct length, and then fasten the chain together using a quick link.
If you would like to know more, please get in touch with us and a member of our staff will be happy to help.