NGX Residential Belt Length Summary
Older Residential NGX Belt Lengths
Belt lengths for NGX garage door openers before 2014
| Rail Length | Part Number | Belt Length |
| 7ft | 220" | |
| 8ft | 37561S.S | 244" |
| 9ft | 37561W.S | 268" |
| 10ft | 37561T.S | 292" |
| 12ft | 37561U.S | 340" |
| 14ft | 37561V.S | 388" |
New/Longer Residential NGX Belt Lengths
Belt lengths for NGX garage door openers after 2014
| Rail Length | Part Number | Belt Length |
| 7ft | 37561R.S | 220" |
| 8ft | 37561S.S | 244" |
| 9ft | 39380U.S | 279" |
| 10ft | 39380R.S | 303" |
| 12ft | 39380S.S | 351" |
| 14ft | 39380T.S | 399" |
Please note: The belt sizes for 7ft and 8ft belts were not changed.