When you want to replace your tyre on, for instance, your motor Cycle you want to protect your rim.
Rim Shiels or Protectors are the things to use!
Print with heavy fill in! (like 80%)
Print on the side! (The stl should be in the right position).
Don't forget to add a brim!
The hole in the rim is meant to put a wire through and connect it to the middle of your wheel.
Check ebay for "Guard Rim Protector Tyre Wheel" and you will understand ;-)