Quick bike drivetrain cleaning. When is it time for a chain change on your bicycle?

Hello my cycling friends!
In this video tutorial I will show you some useful tips on how to maintain your bicycle.
You will see clearly how to determine when it is necessary to replace your bicycle chain with a new one without any special tools. I will also show you how to quickly clean your bike's drivetrain without disassembling all the components.
As you understand, this is a bike from a shop customer. I completed the customer's tasks and produced this educational content for you. Enjoy)

00:00 When is it time for a chain change on your bicycle?
01:05 How to remove a bicycle chain?
02:35 How to measure the elongation of a bicycle chain with a special tool.
03:44 How to measure bicycle chain stretch without a measuring tool.
05:16 How to quickly clean a bicycle cassette.
06:15 How to quickly clean bicycle connecting rods.
10:14 How to install a new chain on a bicycle.
10:16 How to properly shorten a new bicycle chain.