In article ,
"JoeSpareBedroom" wrote:

Any thoughts on this type of spring?

It's a "torsion spring".

My two cars are in exile OUTSIDE my garage as I type because one broke
the day-before-yesterday. (There are two torsion springs on my
double-wide door)

This is the second time one has broken in 16-1/2 years.

I am not convinced that the torsion spring is any more reliable than the
more conventional (linear?) springs that parallel the side rails. If
anything, they might be less reliable.

I am waiting for the garage door - and both torsion springs - to be
replaced in a few days. Good luck to us both.
--

JR