Bicycle hangers designed for securing bikes on a Trolley Rail using rollers.
I designed the hooks, to distribute contact pressure on most bike rims internal surface.
Hook Thread size is ½ - 14 UNS.
Checkout the slatwall bicycle helmet hanger posts.
https://www.printables.com/model/1366183-bicycle-helmet-hanger-slatwall-post
The author marked this model as their own original creation.