CAUTION: Repairing a garage door is a dangerous task. Garage door springs are under extreme tension and require appropriate safety precautions. Realize and understand the risks before undertaking any repair. Your health and safety is the #1 concern. No amount of financial savings is worth jeopardizing your health. Working on or around garage doors and openers could result in property damage, personal injury or death. While all efforts are made to provide accurate information and guidance, it is impossible to predict all repair circumstances. Accordingly, the user agrees that use of all products and information contained herein are at your own risk. In no event shall GARAGE DOOR SPRING .COM or Unique Repair & Supply be liable for any property damage, personal injury/death, or any other loss or damage that may result from your use of the information and products provided on this site. All information contained within this site is provided “as-is” without warranty expressed or implied. User assumes all responsibility/risk for use of information and products purchased.


 There are two bits of information needed to determine the correct extension springs for any given garage door.

Door Weight and Door Height.

We Stock springs for both 7′ and 8′ tall garage doors – we can special order extension springs for any other height garage door and get then to you quickly. By far, 7′ and 8′ are the most common residential garage door heights.

Determining the correct spring for your door can be done one of two ways.

Use the color code or weigh the garage door + measure the door height.

1 – Extension springs are color coated, see the chart below and order accordingly.

The garage door spring industry uses 10 colors to mark garage door extension springs.  Looking at the chart, you will see that the colors repeat, for instance, a 60 pound pull spring is colored BROWN, as is a 160# and a 260# spring as well. There are only so many colors and this system keeps things pretty straight forward.

There are a few things to consider when using the color coding system. Primarily, if the door is very old, the color system now currently in use, that has been standardized in the industry for well over 30 years, may not be the same color code used on very old doors. Years ago, some of the garage door spring manufactures used their own “in house” color coding systems that have no bearing on today’s color coding system. Typically, if you know the doors history, and the garage door is 30 years old or less, the color coding on the existing springs can be trusted.

Another very important factor is the door weight. That is to say, is the door the same weight today as it was when the original springs were calculated for the door? Consider what one gallon of paint weighs. Also, moisture if the door is made of wood or any type of composite material that will absorb moisture. Has anything been added to the door? Insulation, decorative hardware of any substance, have any of the sections or panels been replaced…..All things to consider.

If the current door weight is not the same door weight as when the original garage door springs were calculated, replacing the old springs with the same weight / pull springs is not the way to go. The garage door will not be properly balanced and will not work / function correctly.

That is why we typically will weigh extension spring garage doors when we are replacing  there springs. If your working on a steel or fiberglass door, typically that type of doors weight will remain fairly constant. In that case it is not as important that you weight the doors as it is on wood doors. We weight all wood doors when replacing extension springs.


We stock up to 300 pound pull extension springs for both 7′ and 8′ tall doors.

We can special order extension springs for doors of other heights – we can get these to you quickly – email with your requirements for a quote.



Here are a few other things to consider when replacing extension springs on your garage door.

All extension spring doors have pulleys / sheaves, and these parts wear. They are typically ball bearing type pulleys and over time, the bearings and the bearing chase will wear. Replacing pulleys at the same time you are replacing your extension springs is a very good thing to do. Pulleys are inexpensive and are a very big part of a properly operating garage door. The key to replacing pulleys on a garage door is to replace them with the same size diameter of the existing pulleys.

Door cables – Extension spring garage doors have two sets of cables, the door cables and the safety cables.  The door cables attach to the bottom section of the garage door and run through the pulleys and are part of the operational system of the door. Inspect these cables anytime you are working on the garage door, when you are doing your semiannual basic maintenance  and certainly when replacing the garage door springs. Replace the door cables if there is ANY sign of wear or fraying. Very easy and inexpensive to do when you are replacing the extension springs. A broken cable can shut you down right then and there and is never as simple to replace as it is when you are replacing the garage door springs.

Safety Cables – THE SINGLE MOST IMPORTANT COMPONENT of every extension spring garage door. Safety cables are a static cable that runs from the back hanging of the door track, through the extension spring and terminates at the door jamb or at the front end of the door track. Safety cables will contain the extension spring in the event of a spring, cable or bottom bracket failure. The safety cable prevents the garage door spring from becoming a potentially deadly projectile. When garage door extension springs are under tension, they have an tremendous amount of energy and if not contained, can cause considerable damage and even death – if you come away with nothing else from this tutorial, please note what I am saying about garage door safety cables.

WE INCLUDE A FREE PAIR OF SAFETY CABLES WITH EVERY EXTENSION SPRING WE SELL – We feel that strongly about the 100% need for ALL extension spring garage doors to have safety cables.




Garage Door extension springs have several different types of ends.

Open Loop

Double Closed Loop


We do not carry or sell open loop extension springs. Open loop springs are not nearly as strong as double closed loop and clip type extension springs. Any door that is currently using open loop extension springs can use double closed loop springs and or clip end type for larger springs.

Our springs are double closed loop up to and including 190 pound pull in both 7′ and 8′ tall door lengths. From 200 pound pull and up, our extension springs will come with clipped ends standard.

All of our springs are made in the USA and we only use reputable garage door spring manufactures fro all of our garage door springs. We purchase our garage door springs and all of our garage door parts from US manufactures that have been in the garage door industry for many decades and we have a great relationships with all of our vendors. If any issues arise, together with our vendors if needed, we will quickly and accurately resolve any and all issues.


#10 WHITE #110 WHITE #210 WHITE
#20 GREEN #120 GREEN #220 GREEN
#40 BLUE #140 BLUE #240 BLUE
#50 RED #150 RED #250 RED
#60 BROWN #160 BROWN #260 BROWN
#80 GOLD #180 GOLD #280 GOLD
#90 LT.BLUE #190 LT.BLUE #290 LT.BLUE
#100 TAN #200 TAN #300 TAN