Attached are photos of the wheel and dimensions.
The wheels are supporting 11' high by 60" wide screen doors that were manufactured using Schuco extrusions.
The base of the housing can be longer than 1 ?" but cannot be much wider than ?". I might be able to use ¼" but no more is preferable. There is not much wiggle room for more height than 1 ?".
The location is close enough to the ocean that salt corrosion is an issue.
If there is a spring loaded option it would be better at keeping the doors on the track.
I have also attached a photo of the house that the screen doors are a part of.