Garage Door Spring Types: Torsion vs Extension

Garage door springs are the most critical component of your door system. They counterbalance the weight of the door (often 150-250 lbs) so it can be opened and closed smoothly. When a spring breaks, the door becomes nearly impossible to operate. Understanding the two main types of springs helps you make informed decisions about repairs and replacements.

Torsion Springs

Torsion springs are mounted horizontally above the garage door opening on a metal shaft. They use torque (twisting force) to lift the door. When the door closes, cables attached to the bottom corners force the springs to wind up, storing energy. When you open the door, that stored energy is released, doing most of the heavy lifting.

Advantages of Torsion Springs

• Longer lifespan — typically rated for 15,000-20,000 cycles (about 7-10 years of average use)
• Smoother operation — provide more balanced lifting force across the full range of motion
• Safer design — contained on the shaft above the door, so if they break, parts stay in place
• Less wear on other components — the even force distribution reduces strain on tracks, cables, and the opener

Disadvantages

• Higher upfront cost ($200-$300 per spring installed)
• More complex installation requiring specialized tools
• Should only be replaced by trained professionals due to high tension

Extension Springs

Extension springs run along the horizontal tracks on both sides of the door. They stretch (extend) when the door is closed, storing energy. When the door opens, the springs contract, pulling the door upward via cables and pulleys.

Advantages of Extension Springs

• Lower cost — typically $100-$200 per pair installed
• Simpler replacement — easier for experienced technicians to swap out
• Widely available — found at most hardware stores for common door sizes

Disadvantages

• Shorter lifespan — usually rated for 10,000 cycles (about 5-7 years)
• Safety concern — if a spring breaks without safety cables, it can fly across the garage
• Less balanced operation — can cause the door to jerk or move unevenly
• More wear on tracks and opener from uneven force distribution

How to Tell Which Type You Have

Look at your garage door from inside the garage:

• Torsion springs: One or two tightly wound springs on a shaft directly above the door opening
• Extension springs: Long springs running parallel to the horizontal tracks on each side of the door

Which Should You Choose?

For most homeowners, torsion springs are the better long-term investment. While they cost more upfront, their longer lifespan, safer design, and smoother operation make them the preferred choice for modern garage doors. Extension springs are a reasonable budget option for lighter single-car doors, but always ensure safety cables are installed.

When to Replace Your Springs

Watch for these signs that your springs need attention:

• The door feels heavier than usual or won't stay open
• Visible gaps in the spring coils (broken torsion spring)
• The door opens unevenly or jerks during operation
• Loud bang from the garage (a spring breaking)
• The opener strains or fails to lift the door