Hub Centric Rings are designed to lessen the potential of driving vibration when installing non hub-centric wheels on your vehicle. Hub Centric Rings work by securely filling the gap between your vehicles hub, and your wheels hub bore. This enables the wheel to sit more centered on the vehicles hub, thus potentially lessening wheel vibration when used with a properly tire-mounted and balanced wheel. Sold as a set of four, with a 70.50mm Inner Diameter to match your vehicles hub, and a 78.00mm Outer Diameter to match your wheels hub bore. Color displayed is for representational purposes only - Exact color of product received may vary.