Garage Door Extension Spring Replacement Size

How to weight your garage door.

Garage door extension spring replacement size.

Most extension springs for 7 foot high doors are 25 inches long with a 42 inch stretch. Plug end extension spring the holmes hally p730 30 in. Door with an initial tension of 110 lbs. 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.

The holmes hally p730 30 in. Two p730 springs one on each side of the door can handle a 90 lbs. Sometimes this number is written on the winding or stationary cone. Plug end extension spring is a spring replacement for 1 piece tilt up canopy style garage doors.

Left wind springs are located on the right hand side of the door and right wind springs are located on the left side. For an 8 foot high door the spring would be 28 inches long with a 48 inch stretch. For a more accurate measurement start at the 1 mark on your ruler. Measure 10 coils to the nearest 1 16.

In most cases the stretch of the extension spring should be half of the door height. If your garage door is taller than 7 ft please call our helpdesk at 1 800 731 0261 for assistance. Change the fraction into a decimal and divide by 10. Knowing the spring s length can help you find the wire size on the chart above.

Measure the height of the garage door. If you see a 1 75 on the cone the spring has a 13 4 inch diameter. Measure the diameter of 1 16 of an inch.