Prime Line Products Gd 12191 110 Lb Garage Door Extension Spring

Product Description

The PRIME LINE PRODUCTS GD 12191 is a 110-pound, blue-tip sectional garage door extension spring designed for residential overhead door systems. It ships with a galvanized carbon steel aircraft-grade safety cable threaded through the spring body. That cable is a critical safety feature — if the spring breaks under tension, the cable contains the recoil and reduces the risk of injury or equipment damage. The spring is rated for 10,000 cycles and uses double loop ends for added fatigue resistance at the connection points. Installation is handled by a qualified technician familiar with torsion and extension spring systems.

This spring is intended for residential sectional garage doors no taller than 7 feet. It is sold in a package of 6 units, making it a practical stock item for service technicians who handle multiple door calls. The product is part of a 5-size series engineered to cover the majority of spring configurations found on standard residential doors in this height range. It is appropriate for one-car and two-car residential door applications where extension-style spring hardware is already installed.

Key Features

• 110-pound lift rating matched to standard residential sectional doors up to 7 feet tall
• 10,000-cycle fatigue rating for long service life
• Double loop ends reduce stress concentration and improve connection durability
• Includes 1/8-inch galvanized carbon steel aircraft cable pre-installed through the spring for containment on failure
• Blue tip color coding for quick identification during installation and service
• Sold in a package of 6 units — practical for van stock and multi-door service calls

Compatibility

Designed as part of a 5-size series intended to replace most spring configurations on residential sectional garage doors no taller than 7 feet. Specific door brand and model compatibility should be confirmed against the door manufacturer's spring specifications before installation.

Installation Notes

Extension spring replacement is performed by qualified door technicians or experienced general contractors familiar with counterbalance systems. Disconnect the garage door opener and disengage the door from the track before servicing springs. Extension springs remain under significant tension even when the door is in the open position — always follow safe spring-handling procedures and ensure the safety cable is properly routed through the spring before tensioning. Local building codes and the door manufacturer's installation instructions govern final installation requirements.