The main things to consider when maintain the chains are cleaning and lubrication. If the bike is used in dusty or muddy dirt road, the chain may be replaced every six months.

 

The best way to clean a chain is to remove it and rinse it out in a mixture of solvent with 5% mineral oil, brushing and rinsing it thoroughly. Then dry it out and the mineral will stay. Depending the place you live, if you live in a dry place, the best lubricants are wax-based, and if you live in a moisture place, the best lubricants are grease-based.

 

Here are some bike chain rings for sale on eBay.