Garage Door Extension Springs for 12' High Doors – 53" × 72" – Pair
Replacement extension spring pair with a 53" relaxed length and up to 72" of rated stretch for compatible 12-foot-high sectional garage doors.
These 53" × 72" garage door extension springs are designed to counterbalance compatible 12-foot-high sectional garage doors. Each spring measures approximately 53 inches in its relaxed position and is designed to extend up to approximately 72 additional inches as the door closes.
What Does 53" × 72" Mean? 53" is the approximate relaxed spring length. 72" is the rated amount the spring can stretch beyond its relaxed length during operation. It does not mean the spring is only 72" long when fully extended. At 72" of extension, a 53" spring is approximately 125" long.
Key Features
- For compatible 12' high sectional garage doors
- 53" approximate relaxed spring length
- Up to 72" of rated spring extension
- Available in multiple door-weight ratings
- Helps counterbalance the weight of the garage door
- Choose the correct end style to match the existing spring system
- Sold as a pair for balanced left- and right-side replacement
Pair Weight Rating: Spring ratings on this listing refer to the total garage door weight supported by the pair. For example, a 200 lb. door requires one 200 lb.-rated pair—not two springs each rated for 200 lbs.
Choose the Correct End Style: Match the replacement spring to the existing spring and hardware configuration. Available end styles may include double-loop or clipped ends depending on the selected spring.
Confirm Before Ordering: Verify the door's actual dead weight, 12' door height, relaxed spring length, rated stretch, end style, spring quantity, pulley configuration, and existing hardware. Do not select a replacement spring by color alone.
Replace Springs as a Pair: When replacing an extension spring system, replace both springs with a properly matched pair to maintain balanced lifting force. Properly installed safety containment cables should also be used with extension springs.
Safety: Garage door extension springs and related cables operate under high tension and can cause serious injury if handled incorrectly. Secure the door and fully release spring tension according to the door manufacturer's instructions before service. Professional installation is recommended.
