|This knob was used on NordicTrack ski machines that were produced from 1995 to 1998. The knob is used on the lower portion of the upright tube and it secures the upright tube to the front frame.|
The upright tube knob will become worn and will deteriorate with use. They also are very easy to lose.
Icon also used this style of knob until 2004 so if you have an ICON NordicTrack skier that was built from 1999 to 2004 this will fit your skier.