Measure the diameter of 1 16 of an inch.
Garage door extension spring replacement size.
This is the wire size.
Sometimes this number is written on the winding or stationary cone.
For an 8 foot high door the spring would be 28 inches long with a 48 inch stretch.
Starting with our easy to use selection tool you can easily find the garage door extension springs you are looking for the 1st time.
Plug end extension spring the holmes hally p730 30 in.
Two p730 springs one on each side of the door can handle a 90 lbs.
Change the fraction into a decimal and divide by 10.
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.
Measure 10 coils to the nearest 1 16.
The holmes hally p730 30 in.
This means for a 7 foot high door 84 inches the spring stretch would be 42 inches.
If you see a 1 75 on the cone the spring has a 13 4 inch diameter.
In most cases the stretch of the extension spring should be half of the door height.
How to weight your garage door.
Measure the height of the garage door.
Knowing the spring s length can help you find the wire size on the chart above.
Most extension springs for 7 foot high doors are 25 inches long with a 42 inch stretch.
If your garage door is taller than 7 ft please call our helpdesk at 1 800 731 0261 for assistance.