If you see a 1 75 on the cone the spring has a 13 4 inch diameter.
Garage door extension spring replacement size.
Starting with our easy to use selection tool you can easily find the garage door extension springs you are looking for the 1st time.
Most extension springs for 7 foot high doors are 25 inches long with a 42 inch stretch.
Measure the diameter of 1 16 of an inch.
If your garage door is taller than 7 ft please call our helpdesk at 1 800 731 0261 for assistance.
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.
Measure 10 coils to the nearest 1 16.
This is the wire size.
The holmes hally p730 30 in.
This means for a 7 foot high door 84 inches the spring stretch would be 42 inches.
Left wind springs are located on the right hand side of the door and right wind springs are located on the left side.
Plug end extension spring is a spring replacement for 1 piece tilt up canopy style garage doors.
Plug end extension spring the holmes hally p730 30 in.
Sometimes this number is written on the winding or stationary cone.
How to weight your garage door.
In most cases the stretch of the extension spring should be half of the door height.
For an 8 foot high door the spring would be 28 inches long with a 48 inch stretch.
Measure the height of the garage door.
Knowing the spring s length can help you find the wire size on the chart above.
For a more accurate measurement start at the 1 mark on your ruler.