Wie lässt sich eine Fahrradkette zusammenfügen?

Newly purchased chains always come (almost always) too long. You have to shorten it. They also always come either with a connecting member, the so-called chain lock or with a rivet pin.

To shorten, you need a chain rivet pusher, for connecting to the rivet pin as well. The Chain locksIn my opinion, the link MissingLink chain fastener is the better choice.

https://fischer-bike.com/de-de/fischerkettenietdruecker-universal

You can also rivet chains directly, but real chain rivets with which you do it cost over 100 euros.