Don't confuse "hub centric rings" with "hub centric spacers"
...
Hub centric spacers are metal spacers much like a larger washer. Some of them are bolt on and some of them just slide over your studs. They are used to space wheels out further away from your vehicle's hub. These spacers have the same hub size as your vehicle and therefore can be called "hub centric". They slide over your studs and get, more or less, sandwiched between your wheels and your hub.
Wheel spacers are what you want to stay away from. Wheel spacers , hub centric or not, increase your chances of vibration and increase your risk of stud failure.
Discount Tire does not recommend the use of wheel spacers, hub centric or not, bolt on or not. Discount Tire will not work on any vehicle with any type of wheel spacer.