What is the best spring for a garage door?

The best garage door spring for most homeowners is a coated torsion spring with a high cycle count. Torsion springs balance the door more smoothly, last longer, and are safer than extension springs when they fail. A standard torsion spring rated for 10,000 cycles lasts about 7 years for an average household. Upgrading to a 20,000-cycle high-cycle spring costs 75 to 150 dollars more per spring but doubles the lifespan. Black powder-coated or galvanized springs resist rust in humid or coastal areas. For very wide or oversized doors, dual torsion springs distribute the load and last longer than a single oversized spring. If your door uses extension springs, converting to torsion is often a worthwhile 300 to 600 dollar upgrade for safety and longevity.