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.
Frame the rough opening to 3 inches wider than the garage door size you have selected.
If you are installing a 9 wide door the opening will be 9 3 wide.
Garage door springs offset the weight of the door and allow it to open and close with ease.
If the door is 7 tall frame the opening 7 1 5.
There is no standard garage door size.