Nope, not all chains have master links. If your bicycle has derailleurs, it means it’s unlikely that your bike’s chain will have a master link.
They’ve become known as “quick links.” That’s because they can be connected by hand. Which makes them quick and easy compared to the days of old when the only way to install or repair a chain was by pushing out and driving back in a tight-fitting pin with a chain tool.
quick links are easier and faster. JMHO there really isn’t a pro to using pins. Especially when you buy chains that come with them anyway.
If you have a standard chain with no master link: Seat the chain in the chain tool, with the pin of the chain tool aligned with a pin in the chain. Turn the handle of the chain tool until you push the pin out far enough that you can break the chain.
Every link on a chain is held in place with a chain pin. In some cases, you have to remove a link or two. To remove the link, you need to remove the pin. This can be done with either a chain link gadget or a hammer.
Are Quick Links reusable?
The quick link is designed for use with 11-speed chains and is, according to Shimano, not reusable. Quick links are dead easy to install. Place the quick link into the chain gap, align and snap together – usually done by applying pressure through the cranks.
Are Quick Links reliable?
The quick links are much more reliable than the replacement pins. I’ve had a few pins break because I didn’t have them just right. I’ve never had a problem with the quick links. BTW, I’ve always used connex.
A master link or quick-release link is a roller chain accessory that allows convenient connection and disconnection of a chain without the need for a chain tool. It acts as a set of the chain’s outer plates, so joining two sets of the chain’s inner plate ends. Such master links may or may not be re-usable.