In the video below. you will see how these people repair old bald tires. Definitely this will make you think more when you will go to buy a new or used tires.
This guys has some tool, they remove one layer of the tire and with that tool they repeat the stripes and patterns of the tire. After this operation the tire looks like a brand new.
Everyone would think that this is a new tire and easily can buy it, but after short time of driving you will see the quality of your “new” tires.
Definitely after watching this video we will be more careful about buying new or used tires.