Commercial garage door springs are Not a one size fits all component. There are many factors that go into selecting the appropriate torsion spring(s) for a garage door. Size, weight, track system, door condition/age and the amount of usage the door gets to name a few things that determine the appropriate spring(s). Commercial torsion springs are available in a multitude of sizes based on wire size, overall length and inside diameter these are particulars that determine spring "strength" and cycle life. Cycle life refers to the number of cycles a spring will last before breaking. One cycle of a garage door is starting with the door closed, opening the door and then closing it. Because the spring is wound and unwound every time the door cycles it is similar to bending a paper clip back and fourth until it breaks but torsion springs can last from 10,000 cycles to upwards of 1 million before failing. Generally speaking the higher the cycle rating the more expensive a spring or springs will be, however it is also generally a better value to purchase higher cycle springs as the cost per cycle goes down as well as the number of breakdowns from broken springs which equates to fewer service calls and labor charges which equates to lower repair and maintenance costs. We typically stock upwards of 5 tons of springs to ensure we have the right spring(s) when our clients need them whether the system requires standard torsion springs or duplex torsion springs (spring inside of a spring), although we are able to make temporary repairs in some instances it is always best to have your broken commercial garage door torsion springs replaced sooner than later to reduce risk of personal injury or property damage from catastrophic failure. First Class Garage Door Chicago has the knowledge, experience and inventory to get you up and running safely and reliably for the many years to come. Call now to speak with a torsion spring expert!