Garage Door Extension Springs for 8' High Doors – 27" × 48" – Pair
Replacement extension spring pair with approximately 27" relaxed length and 48" of rated extension for compatible 8-foot-high sectional garage doors.
These 27" × 48" garage door extension springs are designed for compatible 8-foot-high sectional garage doors. Each spring measures approximately 27 inches in its relaxed position and is designed for approximately 48 inches of extension as the garage door closes.
What Does 27" × 48" Mean?
27" is the approximate relaxed spring length. 48" refers to the spring's rated extension or stretch beyond its relaxed length. It does not mean the spring is only 48" long when fully extended. At 48" of extension, a 27" spring is approximately 75" long, depending on how the manufacturer measures the end loops or clips.
Key Features
- Designed for compatible 8' high sectional garage doors
- Approximately 27" relaxed spring length
- Approximately 48" rated spring extension
- Available in multiple garage 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
Select by Door Weight:
Choose the spring rating that matches the garage door's verified dead weight. Do not select replacement springs based only on door height, spring color, or physical length.
Pair Weight Rating:
When this listing rates the springs by total door weight, select the pair that matches that verified weight. For example, a 150 lb. garage door requires one pair identified for a 150 lb. door.
Choose the Correct End Style:
Match the replacement springs to the existing spring and hardware configuration. Depending on the application, extension springs may use double-loop, clipped, or other compatible end styles.
Confirm Before Ordering:
Verify the 8' door height, actual door weight, approximately 27" relaxed spring length, 48" rated extension, end style, spring quantity, pulley arrangement, and existing hardware before selecting a replacement.
Replace Springs as a Pair:
Replace both extension springs with matching springs to help maintain balanced lifting force. Properly installed safety containment cables should also run through the springs and be securely anchored.
Safety:
Garage door extension springs, cables, and pulleys operate under high tension. Secure the garage door and completely release spring tension according to the door manufacturer's instructions before service. Professional installation is recommended.
