How do I tell whether I have torsion or extension springs?

The thirty-second identification

Stand inside your garage with the door closed and look straight up at the wall above the opening. If you see a steel shaft running horizontally across the header with a tightly wound spring — or two, flanking a center bracket — coiled around it, you have torsion springs. They are short, fat, and wound tight.

If the header is bare, turn and look at the horizontal tracks that run back toward the rear of the garage. Extension springs hang alongside those tracks, one per side, long and relatively thin, stretched out when the door is down and relaxed when it is up. That stretch-and-relax motion is where the name comes from.

Why the distinction changes everything

• Different failure behavior. A torsion spring releases against its shaft. An extension spring under load can become a projectile, which is why extension springs need safety cables running through them.
• Different repair procedures. Torsion work needs winding bars and turn counts; extension work is a different job entirely.
• Different balance behavior. Torsion systems generally hold a door more smoothly across its travel.
• Different part sourcing. Sizing a torsion spring involves wire size, inside diameter, and length — see what size spring a door needs.

The variant that confuses people

There is a third thing you might be looking at. Some doors use a system where the springs live inside a tube along the header rather than out in the open, so the header looks like it has a shaft but no visible coils. That is usually a TorqueMaster-style setup, and it is a torsion system with its own parts and its own service quirks. The differences are covered in TorqueMaster versus standard torsion springs.

If what you see does not match any of these three descriptions, take a photo from inside and bring it to the conversation — that one picture usually settles it immediately.

If you have extension springs

Two things are worth knowing. First, check that safety cables run through them; on older installs they are frequently missing, and that is a genuine hazard rather than a formality. Second, extension springs can often be converted to torsion, which most people find quieter, smoother, and easier to balance — the trade-offs are in converting extension springs to torsion.

Either system is safe when properly installed and maintained, and neither is something to service yourself. Our technicians work on both across the OKC metro, and identifying what you have costs nothing.