What torsion spring size does your garage door need?

You can determine the proper spring size for your garage door using two main methods. If your door was operating correctly and wasn't too heavy or too light when the springs were intact, you can simply replicate the springs you already have on the door. The first method is to measure your current spring size and order the same size. You need three numbers to properly size garage springs: the WIRE SIZE, the INSIDE DIAMETER, and the LENGTH of the coils (length does not include the two end pieces, called cones). You will find a video guide for measuring your torsion springs under out VIDEO GUIDES page.

The second method is to determine the proper spring size using IPPT (inch-pounds-per-turn). The numbers needed to make this calculation are the door weight, height, garage track radius (12" or 15"), and the number of springs you're using. You can run an online search for this method, and you will find websites that allow you to plug these numbers in (along with help on how to find the track radius, which is simple). Once you plug these numbers in, their calculator will show you the spring sizes that will work for your door.