Hub centric rings, not to be confused with hub centric spacers, are typically made of plastic or metal, and are designed and used to fill the gap between the hub pilot of the vehicle and the center bore of the wheel.
A hub centric ring’s sole purpose is to help align and center the wheel and tire assembly on the vehicle’s hub pilot. Once the wheel assembly is torqued, the hub centric ring’s job is complete. Hub rings help reduce and can eliminate wheel and tire vibrations caused during installation.
For more on hub centric rings check out
THIS WRITE UP.
Which Black Rhino wheel did you install
@PebbleCrawler 31 - Warlord? I'm happy to see if there is an applicable ring available.