Extension Springs - FAQs & Troubleshooting

To order the right replacement, you will need the height and weight of your garage door. Extension springs are also color coded, but those colors repeat every 100 lbs, so always confirm against the actual door weight and size.

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• 7ft extension springs
• 8ft extension springs

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The painted tip shows the weight rating for your spring. Since colors repeat every 100 lbs, always confirm with the actual door weight or measurements instead of relying on color alone.

Here is the full color code chart for common extension springs:

• Blue: 40 lbs, 140 lbs, 240 lbs
• Red: 50 lbs, 150 lbs, 250 lbs
• Brown: 60 lbs, 160 lbs, 260 lbs
• Orange: 70 lbs, 170 lbs, 270 lbs
• Gold: 80 lbs, 180 lbs, 280 lbs
• Light Blue: 90 lbs, 190 lbs, 290 lbs
• Tan: 100 lbs, 200 lbs, 300 lbs
• White: 110 lbs, 210 lbs, 310 lbs
• Green: 120 lbs, 220 lbs, 320 lbs
• Yellow: 130 lbs, 230 lbs, 330 lbs

Example: A gold tip may indicate an 80 lb, 180 lb, or 280 lb spring depending on the door height. Always cross-check with door weight.

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Extension springs stretch when the door is closed and release stored energy when the door is opened. They are mounted on both sides of the garage door and attach to cables that counterbalance the door weight. This allows the door to lift smoothly with less effort.

Weighing the door is the most reliable way to match the correct spring:

• Disconnect the opener and secure the door in the open position.
• Remove the extension springs from the track supports.
• Place a bathroom scale under the center of the door and lower it slowly onto the scale.
• If the door is too heavy for one scale, use two scales with a 2x4 across them to spread the load, then add the readings together.

Always use caution when lowering a heavy garage door. Have at least one other person assist you to prevent the door from dropping suddenly.

Extension springs are made with different end styles that affect their durability and use:

• Single loop: The easiest to replace, used on doors up to 200 lbs. Ends wear faster.
• Double loop: Stronger than single loop, standard on most residential doors up to 200 lbs.
• Clipped ends: The most durable style, standard for doors over 200 lbs.

Learn more in our extension spring FAQ guide

You should always replace extension springs in pairs. Both springs share the load, and even if only one has broken, the other has been stretched and fatigued. Replacing both ensures the door stays balanced and prevents uneven wear or future failure.