Thank you for your recent inquiry regarding this item from Prime-Line Products. The track we use in our bi-fold door kits is compatible with this N-7302 bi-fold door top guide wheel. Kindly contact the Customer Service personnel at Prime-Line Products regarding the track included in these kits: Item no. 164684 for 24 in. track, #164685 for 30 in. track, #164686 for 36 in. track, and #164687 for 48 in. track. Photo attached below of how these fit together. Note: The tracks used in the kits listed and depicted in attached photo are compatible with this top guide wheel, but the wheel may disengage if there is any sag or drop in the bi-fold door/s.
For additional questions regarding this item, or any other product manufactured by Prime-Line Products, please call their toll free number at (877) 649-9740, or contact them by email at email@example.com