I have the bottom track on my bifold mirror door that hangs up. 1" wide 36" long. The top roller seems a little weak as well and comes out of the track.
Paul from SWISCO responded:
December 22, 2016
The guide wheel looks like either our 23-114 or 23-120. It's hard to make out your bottom track, so I'm not sure. Furthermore, the 23-114 is mostly used in mirrors. Would you be able to remove it from the door and show us a picture of it by itself?