PreeminentMotors hub centric rings are the perfect way to finish your new wheel or wheel spacer installation. These hub rings ensure a perfectly smooth, vibration free ride. Easy Installation Specification: Material: Durable selected aluminum for reliable quality and excellent performance. Inner Diameter: (Vehicle Hub Size) 71.5mm Outer Diameter: (Wheel Bore Size) 73.1mm Placement on Vehicle: Left, Right, Front, Rear Item included: 4 x Plastic hub rings Compatible with: Fit for any vehicle with a 71.5mm hub that needs to adapt a wheel or wheel spacer with 73.1mm center bore. Important Note: 1.Please ensure your Vehicle's Hub is 71.5mm. 2.Please ensure your Wheel's or Wheel spacer’s Centerbore is 73.1mm. 3.If you are not sure about fitment or the measurements, please contact us, we would offer the help as soon as possible. 4.Please make sure to clean your hub prior to installation. Because of the tight tolerances of the hubrings (to ensure tight fit), a dirty hub could cause the ring unfit Tips: What Are Hub-Centric Rings For? Most aftermarket wheels or wheel spacers have a large center hub diameter so the wheels or wheel spacers will fit a variety of different vehicles. The hub centric rings are made to fill the clearance between the wheel/wheel spacers and the vehicles hub to ensure the wheel is perfectly centered. This not only makes installation of your new wheels much easier but will also help eliminate any vibrations you may encounter.