SSR Hub Centric Rings - 73-66.1mm - Pair. Fits Nissan, Infiniti. SSR Hub Centric Rings are made of a high grade plastic with a temperature range of -40 to +180C. Normal Polycarbonate Hub Ring material has a temperature range of -40 to +125C. Reduce wheel vibrations with non hub centric wheels using vehicle specific hub centric rings. Match your wheel center bore size with your vehicles hub size to find the correct hub centric ring for your application. First number is Outer Ring Diameter in Millimeters, second number is Inner Ring Diameter in Millimeters. The outer ring diameter matches your wheel center bore, the inner ring diameter matches your vehicle hub size.