The master link, also known as a fast link or link rivet, is a pair of two outer plates, with each plate resembling the outer plate of a chain. If you don’t have a chain tool, a quick-release master link enables you to join or detach a chain. It also serves as a set of the chain’s outer plates, connecting two sets of inner links.
Because a quick link may or may not be reusable, when you disconnect a chain to replace it, you may end up discarding the old master link.
There are two kinds of master links. The first kind is a straight-chain line-compatible link, often seen on single-speed and hub-geared bikes. The other is a derailleur-compatible external link.
What is the master link on a bike chain for?
A master link makes it simple to connect and unhook your bike chain. There are specialist tools that make disconnecting a master link even simpler.
Do all bikes have master rivets?
Master links are not present on all bikes. They are often seen on single-speed or three-speed bikes with internal gears or on BMX bikes. If you’re uncertain whether you have a master link, just measure the distance between your connecting plates. If it’s at least 1/8 inch, your chain should have a master link.
How to identify and find the master link
To find the master link, first, mount your bike on a bike work stand. If you don’t have a work stand, turn the bike over and rest it on the handlebars and saddle. Next, stand on the drivetrain side of your bike to look down on the chain. Turn the pedals slowly to rotate the chain as you watch each link go by. You’ll notice a link that’s wider than the others. Your main link is the widest one.
How to unlock the master link rivet by hand
To unlink the master link by hand, follow these easy steps:
- Find the rivet. The rivet will either have a spring clip that looks like a horseshoe on the side or special easy-release pins.
- Use a set of needle-nose pliers and pull off the piece that looks like a horseshoe.
- Pull off the side plate of the link and slip the chain apart.
- Bend the chain where the master rivet is as if trying to form the link into a U shape. This will loosen the side plate.
- Finally, pull off the plate and take the chain apart.
How to remove a chain with a chain tool
If you can’t find the master link on your bike or have a chain without this master link, use a chain tool to open your chain.
- Before using the tool, slip your chain off the gears to keep the chain from snapping when the tension is released.
- Position the chain tool over any link so the rod of the chain tool is lined up with a pin on the link.
- Finally, turn the lever on the chain tool to push the rod forward until the pin pops out.
- The chain is now open and ready for cleaning or replacing.
About chain master link
“chain master link sizes”
“chain master link tool”
“chain master link direction”
“chain master link clip”
