Assuming your garage door has standard 12” radius tracks and 4” drums, you’ll need to use a pair of 262 x 1-3/4” x 36” springs.

Hello Cary, thanks for reaching out. There’s no way for us to determine what your spring’s length should be since it’s not a one size fits all scenario. Some springs may come in 20 inches long while others 40 inches (when in equilibrium state). However, torsion springs that are under load usually extend up to 2 inches. Keep in mind that the spring’s extended length varies according to the height of the door (since higher doors travel a greater distance). Also, galvanized springs tend to get weaken over time, therefore, might need to be overextended when recalibrated in order to produce the proper torque levels.

I have more to this problem basically the old spring was mounted at 3feet and still lifting 16 ft door when he in put new spring on he pushed it in to 2 ft and kept reminding me that the old spring is not far behind the new from breaking then he pushed both in real tight what kind of measurement should I have from center of where spring is mounted to axle or shaft on each side and or over all total is it pushed in to far or can I stretch it out more like it was

Someone serviced my door it is a 16 foot 2 spring all I want to know is if I measure springs with door closed how long should it be approx I think he crammed them to Cole to center I had him replace one broken spring but the other was still lifting door and was not pushed in to two feet in total I’m just wanting to make sure that hes not trying to make it break the old spring