Garage Door Extension Springs

13 days ago

I am getting ready to replace the extension springs on my 160 lb garage door that is 7' tall by 16' wide. The spring length says 25" and 42", which I know is the relaxed length and the "stretched" length. My question is when I look at the extension springs that are currently on the door that are only 130 lb springs, (wrong springs and the reason I'm replacing them), the springs are stretched to 72" with the garage door closed. Is this normal with extension springs? I guess I'm confused as to why the length of the spring is 25" & 4"2 but the spring is stretched to 72" when the door is closed. Would someone please explain this?

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