Do bike chains have a master link?
Replacement Pin or Master Link: New chains will come with either a new pin, or a specialized link called a master link, to connect the two ends of the chain together.
Can you put 2 master links on a chain?
A master link is just as strong as any other link on the chain. There’s no reason you can’t use a couple of them.
How often should I change my bike chain?
The 2,000-Mile Rule. To avoid this accelerated wear of your cassette and chainrings, a general rule of thumb is to replace your bike’s chain every 2,000 miles. Mind you, this is just a starting point. No two chains will wear at exactly the same rate because no two riders treat their chains the same. 4