Garage Door Extension Spring Replacement Size

Most extension springs for 7 foot high doors are 25 inches long with a 42 inch stretch.

Garage door extension spring replacement size.

If your garage door is taller than 7 ft please call our helpdesk at 1 800 731 0261 for assistance. Measure the height of the garage door. The holmes hally p730 30 in. Plug end extension spring the holmes hally p730 30 in.

How to weight your garage door. Left wind springs are located on the right hand side of the door and right wind springs are located on the left side. This means for a 7 foot high door 84 inches the spring stretch would be 42 inches. Sometimes this number is written on the winding or stationary cone.

If you see a 1 75 on the cone the spring has a 13 4 inch diameter. Starting with our easy to use selection tool you can easily find the garage door extension springs you are looking for the 1st time. In most cases the stretch of the extension spring should be half of the door height. Knowing the spring s length can help you find the wire size on the chart above.

Measure 10 coils to the nearest 1 16. This is the wire size. Door with an initial tension of 110 lbs. For a more accurate measurement start at the 1 mark on your ruler.

Measure the diameter of 1 16 of an inch. Change the fraction into a decimal and divide by 10. 8 doors require a 27 spring that stretches up to 48 75 total length when to door is closed extension springs are a non returnable item call customer service if you have any questions.