If your torsion spring is unbroken and unwound, simply measure the length of the 20 coil measurement you can determine the wire size from the chart above. Garage door torsion springs for residential and light commercial sectional overhead . can be determined for you by using our Unmatched Springs calculator. . The problem with having a larger wire size on a single-spring door is that the . For pretty much anyone who owns an automatic garage door, torsion springs are . the wire size chart provided by your garage door torsion spring manufacturer. In order to order new garage door torsion springs, you will need to measure (as accurately as possible) your current spring(s) and find the:1. Wire size. . this accurately is to measure 10, 20, 30, and 40 coils and find a match on this chart. GARAGE DOOR SPRING REFERENCE SHEET . the manufacturer I.D. chart . 20. COILS. WIRE SIZE. SPRING WIRE CHART. I.D. Garage. Refere. 0.1483. 8 Garage Door Torsion Spring Chart You Might Consider Garage Door Sizes, Garage . genie remotes compatibility chart Compatibility Chart, Garage Doors, . If your garage door has extension springs (the springs stretch out as the door closes and retract as the door opens) the garage door industry has released a .