The center ring is an adapter for a suitable wheel spacer. When you install the wheel spacer for modified styling. These are the center pieces for the wheel which won't shake during high speed.
you can check with your car model fitment, such as center bore, PCD, Threaded size.
Here is the link can help to check out your car's parameter: www.wheel-size.com/
Please find out the center bore your car.
e.g: Q: What is the meaning of 67.1-54.1 ?
Answer: "67.1" is the size of wheel spacer center bore(67.1mm).
"54.1 " is the size of your car's center bore(54.1 mm)
so you need to check your car's center bore to match a suitable center ring.
If there is any problems, please contact with me before purchasing.