- How do I know this spring fits my door?
- It is built for an 8-foot-high door and delivers 120 lb of pull. Match that rating and the green DASMA code to the spring you are replacing, and check the 1.094 in inside diameter against your hardware.
- Should I replace both springs at once?
- Yes. Springs on the same door wear at the same rate, so a new spring paired with an old one leaves the door unbalanced. Buy two matched 120 lb springs.
- How long will it last?
- It is rated for a minimum of 10,000 cycles. One open-and-close is one cycle, so a door cycled four times a day reaches that rating in roughly seven years.
- What is the stretch range for?
- The spring stretches from 27 to 48 inches in use. Set the door's lift so the spring works inside that range rather than overstretching it.
- Do I need safety cables?
- Yes. Extension springs should run through safety cables so a broken spring stays contained. Cables are not included with this spring.
- Is this a torsion or extension spring?
- It is an extension spring. It runs along the horizontal track above each side of the door, not on a shaft above the opening like a torsion spring.
- Where is the 120 lb. Garage Door Extension Spring- 8' Door cheapest?
- At Home Depot, for $19.50, as of our latest check.
- Where can I buy the 120 lb. Garage Door Extension Spring- 8' Door?
- 4 stores we checked sell it, including Home Depot, eBay, American Garage Door Supply, Amazon.