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120 lb. Garage Door Extension Spring- 8' Door

120 lb. Garage Door Extension Spring- 8' Door

Best price now

$19.50at Home DepotChecked 6 h ago

Compared across 3 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $19.50 at Home Depot (checked Nov 15, 2026).
  • Checked at 3 stores.

Our take on the 120 lb. Garage Door Extension Spring- 8' Door

This is a single extension spring for an 8-foot-high sectional garage door, rated at 120 lb of pull and coded green under the DASMA color standard. It is made from spring wire with double-looped ends, a 1.094 in inside diameter, and stretches from 27 to 48 inches. It is rated for a minimum of 10,000 cycles. That cycle rating is on the low side next to the 15,000 to 25,000 cycles typical of better extension springs, so it suits budget repairs and lighter doors rather than long-term use on a door that opens several times a day.

Best forOwners replacing a broken spring on an 8-foot doorDoors needing 120 lb of lift per sideDIY repairs where a matched pair is bought togetherLight-use or rental garage doors
Pros
  • Clear 120 lb rating matches the door weight it is built for
  • DASMA green color code makes pairing easy
  • Double-looped ends for standard extension-spring mounting
  • Stated 27 to 48 inch stretch range
  • Standard 1.094 in inside diameter fits common hardware
Cons
  • 10,000-cycle rating is low for daily-use doors
  • Sold as one spring, so both sides should be replaced together
  • No safety cable included
  • Extension springs store heavy tension and are risky to install without experience

120 lb. Garage Door Extension Spring- 8' Door prices at every store

  • Home DepotNew

    In stock

    $19.50Free shippingChecked 6 h ago
    Visit Home Depot
  • American Garage Door SupplyNew

    In stockReturn policy

    $24.99Checked Nov 7
    Visit American Garage Door Supply
  • eBayNew

    Availability unknownSold by ariel0-35

    $21.02Checked 6 h ago
    Visit eBay

Also available at

  • AmazonCheck price at Amazon

Store links may earn us a commission.

120 lb. Garage Door Extension Spring- 8' Door price history

Lowest price we've seen: $19.50 on Nov 15 at Home Depot. Tracked across 3 stores since Nov 15.

About the 120 lb. Garage Door Extension Spring- 8' Door

This extension spring is made for garage doors that are 8 feet high. It is made from high quality spring wire and has double looped ends.

It provides a 120 lb. pull and stretches from 27 to 48 inches. It is rated for a minimum of 10,000 cycles.

Door height
8 ft.
Pull
120 lb.
Stretch
27" - 48"
Inside diameter
1.094 in.
Ends
Double looped
Cycle rating
Minimum of 10,000 cycles
Color code
Green (DASMA)
Material
High quality spring wire

Questions and answers

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.

Stores we've priced the 120 lb. Garage Door Extension Spring- 8' Door at

  • The Home Depot deals and prices

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