Garage doors use one of two spring systems — torsion or extension — and knowing which you have matters when a spring wears out, because they work differently, last different amounts of time, and cost different amounts to replace. The good news: you can tell them apart in about five seconds. Here’s how, plus how each one works and which is better for Arizona homes.
Quick answer: Look at your closed garage door from the inside. If there’s a metal shaft with one or two tightly-wound springs mounted horizontally on the wall just above the door, you have torsion springs. If you see long, stretched springs running along the horizontal tracks on each side (up near the ceiling), you have extension springs.
| Torsion springs | Extension springs | |
|---|---|---|
| Location | Horizontal shaft above the door | Along the side tracks, near the ceiling |
| How it works | Twists (torque) to lift the door | Stretches and contracts to lift the door |
| Typical lifespan | ~15,000–20,000+ cycles | ~10,000 cycles |
| Balance & smoothness | Smoother, better balanced, less wear on the opener | Jerkier, more strain on parts |
| Safety | Contained on the shaft when it breaks | Can fly loose unless safety cables are installed |
| Upfront cost | Higher | Lower |
| Best for | Most modern & heavier doors | Older & lighter single-car doors |
Torsion springs mount on a metal shaft along the wall directly above your closed garage door. When the door moves, the spring twists — storing and releasing energy as torque to counterbalance the door’s weight. Most doors have one spring; heavier or wider doors use two.
Torsion is the modern standard for good reasons: it lifts the door more smoothly and evenly, puts less strain on the opener, and is generally safer because a broken torsion spring stays contained on the shaft rather than snapping loose. It also lasts longer — typically 15,000 to 20,000+ open/close cycles.
Extension springs run horizontally along the tracks on either side of the door, up near the ceiling. Instead of twisting, they stretch and contract — extending when the door closes and pulling back to help lift it open. You’ll usually see a pair, one on each side.
They’re most common on older and lighter single-car doors, and they’re cheaper upfront. The trade-offs: they wear out faster (around 10,000 cycles), operate a little less smoothly, and can be dangerous when they break — a snapped extension spring under tension can fly across the garage unless safety cables are threaded through them. If you have extension springs without safety cables, that’s worth addressing.
Open the garage, close the door, and step inside. Then look:
That’s it — the location tells you everything. If you’re still unsure, snap a photo and a technician can identify it instantly.
For most homeowners, torsion springs are the better system: they last longer, balance the door more smoothly, are easier on the opener, and are safer when they eventually fail. Extension springs win only on upfront cost, which is why they linger on older and lighter doors.
If your door currently uses extension springs and they’re due for replacement, many homeowners take the opportunity to convert to a torsion system — it costs more now but pays off in durability and safety, especially on the heavier insulated doors common in newer Gilbert-area homes.
Spring life is measured in cycles — one open plus one close. A 10,000-cycle spring used four times a day lasts roughly seven years; heavy use shortens that, and Arizona’s heat and dust wear springs faster than average. We break the numbers down in how long garage door springs last in Arizona’s heat. For pricing on either type, see our guide to garage door spring replacement cost in Gilbert.
Both types store an enormous amount of energy under tension — enough to cause serious injury if a winding bar slips or a spring lets go. Spring replacement is consistently ranked among the most dangerous DIY home repairs, and getting the spring size or wind count wrong throws the door out of balance and wears out the opener. This is a job for a technician, and usually a quick one. If yours has already snapped, here’s exactly what to do when a garage door spring breaks.
If your spring is worn, broken, or you want to upgrade from extension to torsion, a technician can size and install the right spring safely — and balance the door so your opener isn’t doing extra work. In Gilbert, we offer same-day garage door spring repair with flat, upfront pricing and a warranty. Request a free quote and we’ll get the right spring on your door.
Look at your closed door from inside. A spring or two wound around a horizontal shaft above the door means torsion. Long springs stretched along the tracks on each side near the ceiling means extension. The location is the giveaway.
Torsion springs last longer — typically 15,000–20,000+ cycles versus about 10,000 for extension springs — and they balance the door more smoothly, which also reduces wear on the opener.
Yes. If your extension springs are due for replacement, a technician can convert the door to a torsion system. It costs more upfront but is more durable, smoother, and safer — often worth it on heavier insulated doors.
Generally, yes. A broken torsion spring stays contained on its shaft, while a broken extension spring can fly loose under tension unless safety cables are installed. If you have extension springs without safety cables, adding them is an easy safety upgrade.
It depends on the door’s size and weight. Many doors use a single torsion spring, while heavier or wider doors — and most extension setups — use two. If you have two and one breaks, replacing both at once is usually recommended since they wear at the same rate.
