What Size Extension Spring Do I Need For My Garage Door

Door must be in the fully open position to remove the tension.

What size extension spring do i need for my garage door.

For an 8 foot high door the spring would be 28 inches long with a 48 inch stretch. Whatever the case garage door springs are an essential component of the garage door system and are independent of the automatic garage door unique opener. Once you know the total weight of your garage door using a bathroom scale for doors under 300 pounds you can use the chart below to see the color extension spring you need. Starting with our easy to use selection tools you can easily find the garage door extension springs you are looking for.

For a 7 foot tall garage door you should put 29 quarter turns on each spring. When using two scales add the weights together for the total door weight. Most extension springs for 7 foot high doors are 25 inches long with a 42 inch stretch. This is the wire size.

Total door weight indicates the springs you will need for example if the door weighs 100 pounds you need two 100 pound springs one on each side. We would be glad to help. For a more accurate measurement start at the 1 mark on your ruler. Please feel free to give us a quick call if you run into problems choosing the right garage door extension springs.

Change the fraction into a decimal and divide by 10. When you are preparing to buy a garage door spring you need to also take into consideration the overall cost of buying or replacing your springs. Torsion spring inside diameter and overall length in many cases the inside diameter of the torsion spring will be indicated on the stationary cone in between the two springs at the midpoint of the door. Knowing the spring s length can help you find the wire size on the chart above.

1 75 means the inside diameter is 1 inches.