Here is how to adjust mechanical disc brakes on a bike. If your bicycle has mechanical disc brakes, they are easy to adjust, and you can adjust them using the drum screw on the lever, for small adjustments, and for bigger adjustments, you’ll have to tighten up the cable at the disk brake caliper on your bicycle. This video shows you how to adjust the mechanical disc brakes on a bicycle, and it is a very easy job to do by yourself. I show you how I adjust the mechanical this brakes on my mountain bike.
Here is where to get a tool kit to carry on your bike:
https://amzn.to/3j3eyMV