On this chain a special pin is inserted that takes the place of a stock pin. Chain joined with special replacement pin

That way, if you carry a chain tool on rides, you'll be able to rescue your friends if theirs break. You can click the links below to jump to that type of chain or you may want to read about all of them so you'll be able to replace/repair any chain. Though there are similarities, each type requires a slightly different technique for replacement. There are 3 types of chains named and described below. Skipping is dangerous and you should replace the cassette immediately.

This skipping is caused by the new chain slipping on worn cogs. You'll know this is the case because when you ride your bike with the new chain you'll experience a skipping sensation while pedaling. Note that if you wait too long you'll probably need at least a new cassette (or some new cogs) to go with your new chain, and perhaps a new chainring. You'll also enjoy smoother shifting and pedaling if you always keep a good chain on your bike. If you just keep riding, you'll wear the chain, cassette and even the chainrings. When you replace your chain regularly, your other drivetrain components will last a lot longer, which saves you money. It's important to check your chain every few months and replace it before it's too far gone.

it's also helpful to have a repair stand, which lets you work on the bike at a comfortable height and makes it easy to pedal by hand to check for any tight links or problems after you've installed the new chain.

special replacement pin or link for your chain (supplied with the new chain).

chain tool compatible with your chain type (we recommend carrying one with you on rides, too).

chain (must be compatible with your bicycle for example 9-speed for a 9-speed cassette).

Park Tool Chain Checker Tool or a ruler.

If the distance measures 12 1/8 inches or more, your chain is worn out and should be replaced. On a new chain you'll be able to measure exactly 12 inches between 2 chain pins.

You can purchase the Park Tool Chain Checker and use it, or you can measure the chain for wear. For example, as long as you carry a chain tool, it's a fairly simple matter to repair something as serious as a broken chain, which would otherwise leave you stranded. The techniques used to replace a chain will also help you repair one should you or a riding companion have a problem on the road or trail.

Bicycles with derailleurs use a chain that normally cannot be removed unless you separate one link with a chain tool (photo, left), a special bicycle tool that lets you push a pin out of the chain (more about this procedure later). Here we explain how to replace a chain on a derailleur-equipped bicycle so that you can install a new chain when yours wears out.

Bike chain too long or too short