Cycle rating
The number of full open-and-close cycles a garage door spring is engineered to survive — 10,000 on a standard spring, 25,000 or more on a high-cycle spring.
- Standard spring, 10,000 cycles
- High-cycle spring, 25,000 cycles
One cycle is one complete open and one complete close. A standard residential spring is rated at 10,000 cycles, which sounds enormous until you divide it by real use: four openings a day is roughly seven years, eight a day is closer to three and a half.
High-cycle springs use thicker wire on a larger diameter to reach 25,000 cycles or more, and add roughly $40–$80 to a fitted pair. On a door used heavily — a household where the garage is the main entrance — that is the clearest value upgrade available.
Cycle rating is impossible to identify by eye once a spring is fitted, so it should be specified in writing on the quote. A standard spring supplied at a high-cycle price is the most common overcharge in the trade.
To work out what a rating means for your door, count how many times it opens on a normal day and multiply by 730 for a year. Two cars leaving and returning is four cycles, plus a bin run and a bike, so eight a day is realistic rather than pessimistic. At eight a day a 10,000-cycle spring is a three-and-a-half year part, not a ten-year one. That arithmetic is usually what settles the high-cycle decision, and it is worth doing before the technician arrives rather than on the doorstep.
Use is not the only thing that consumes cycle life. A door that is out of balance makes the spring work outside the range it was wound for, and corrosion does the rest — a coastal or humid garage will take years off a spring regardless of how often the door moves. The rating also assumes the spring was correctly sized and correctly wound in the first place. So treat the number as a ceiling under good conditions rather than a promise, and treat any spring that fails markedly early as a sign to have the balance checked before the replacement goes in.