Why do you break the bead from both sides to change a tube?Updated 2 years ago

Typically, you break the bead on one side, remove the damaged tube from the tire, and replace it. When you work this way, the bead does not need to be broken from the opposite side. When changing the air tube with our machine, you actually remove the entire tire together with the tube, change the tube, and when mounting it, you slightly inflate the tube and install it together with the tire. Pulling the air tube out and putting it back in is not very comfortable because the valve needs to go through the hole and is rather difficult.