A problem with the spring tension could cause the door to open or close unevenly improperly or at the wrong speed and adjusting the springs will likely solve the problem.
Sieting garage door.
If the door is 7 tall frame the opening 7 1 5.
If you are installing a 9 wide door the opening will be 9 3 wide.
Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
There is no standard garage door size.