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Torsion vs extension springs, and which your door likely has
Garage door springs do one job: they counterbalance the door so the opener or your arm only moves a few pounds. There are two designs, and knowing which you have shapes every decision that follows. Torsion springs mount on a metal shaft above the door opening. Extension springs stretch along the horizontal tracks on each side.
Torsion is the more durable and controlled design. The spring winds and unwinds on the shaft, so its force stays smooth and predictable through the whole travel. Torsion setups also fail more safely, because a broken spring stays on the shaft instead of flying loose. They cost a bit more, and they are sized precisely by wire size, inside diameter, and length.
Extension springs are cheaper and common on older or lighter single doors. They must run with safety cables threaded through them, so a snapped spring cannot become a projectile. If your door has a shaft and springs above the opening, it is torsion. If the springs run parallel to the tracks near the ceiling, it is extension.
One spring or two, and why pros replace in pairs
Doors use one or two springs depending on weight. A light single door may ride on one torsion spring. Heavier doors and most double-wide doors use two springs, which balances the load and reduces strain on any single part.
When you have two springs, the honest advice is to replace both at once, even if only one broke. Both springs were installed together and have taken almost the same number of cycles. The unbroken one is near the end of its life, so it will likely fail soon after.
Replacing in pairs saves you a second service visit and keeps the door balanced. A mismatched new-and-old pair pulls unevenly, which wears the opener and the tracks. For a single-spring door, you simply replace the one spring with the correct match.
Standard vs high-cycle springs, and whether the upgrade fits you
Springs are rated in cycles, where one cycle is a single open plus close. A standard spring is rated around 10,000 cycles. For an average household, that works out to roughly seven years of use before the spring wears out.
High-cycle springs are rated for 25,000 cycles or more. They use thicker wire or a longer spring to reach that life. They cost more up front, but they last far longer, so the choice comes down to how often your door moves.
Count your real usage. A busy family that opens the door six or more times a day, or a household that uses the garage as the main entrance, will burn through a standard spring quickly. For that pattern, high-cycle springs are usually worth the added cost. A door that moves once or twice a day rarely needs the upgrade. See the cost guide for how the two options compare on price.
Just the springs, or the whole door?
A broken spring feels dramatic, but it is not a reason to replace the door. Springs are a normal wear item, like brake pads on a car. They are designed to be replaced several times over the life of a good door.
So a spring failure by itself is a repair, not a teardown. If the door panels are straight, the rollers roll, and the tracks are sound, you replace the springs and move on. The door itself can easily outlast several sets of springs.
Look at the whole door only when other problems stack up. Bent or rotted panels, a cracked or rusted-through section, or repeated failures across many parts can tip the math toward a new door. Absent those signs, treat a broken spring as the routine repair it is.
Pro vs DIY, the honest safety call
This is the one decision where the answer is firm. Garage door springs store extreme tension, enough to cause serious injury if released without control. Torsion work in particular requires winding bars and correct technique to load the spring safely.
Because of that stored energy, spring replacement is a job for a trained pro. The risk is not in the price of the part; it is in the winding, the balance, and the small details that keep the spring from letting go at the wrong moment. A pro also confirms the door is balanced before leaving.
Watch for the common signs of a failed spring: the door will not open or feels suddenly very heavy, a visible gap appears in the torsion coil, or you hear a loud bang from the garage. When you see these, stop using the door and call a pro. The cost guide covers what the repair involves and how to hire well.
Common questions
Common questions
The practical details.
Torsion or extension springs, which is better?
Torsion is the better design for most doors. It lasts longer, runs more smoothly, and fails more safely because the spring stays on its shaft. Extension springs cost less and suit lighter or older doors, but they need safety cables to stay contained. In most cases you keep whichever type your door was built for, since switching means new hardware.
Should I replace one spring or both?
If your door uses two springs, replace both at once. They wear together, so the unbroken one is close to failing too. Replacing in pairs avoids a quick second repair and keeps the door balanced. A single-spring door only needs the one spring, matched correctly to the door weight.
Are high-cycle garage door springs worth it?
It depends on how often your door moves. A standard spring lasts about 10,000 cycles, or roughly seven years of average use. High-cycle springs last 25,000 cycles or more and cost more up front. For a busy household or a garage used as the main entrance, the upgrade usually pays off. For light use, a standard spring is fine.
Can I replace a garage door spring myself?
This is strongly discouraged. Garage door springs hold extreme tension that can cause serious injury if it releases without control. Torsion springs in particular need winding bars and proper technique to handle safely. Hire a qualified pro for spring work; the small savings are not worth the risk.
Next step: use the garage door spring repair cost calculator to get an itemized, state-adjusted estimate for your project. Last reviewed 2026-08-15.