Experiencing vibration after installing aftermarket wheels? These hubcentric rings might be the fix. The set includes four polycarbonate rings that adapt a wheel with a 66.1mm center bore to a vehicle hub with a 59.6mm diameter. They fill the gap between the wheel and hub, ensuring a perfect centered fit, which reduces or eliminates vibrations at higher speeds. Polycarbonate is strong yet lightweight, and it won't corrode like metal. Installation is simple: just place the ring into the wheel's center bore before mounting it onto the car. They're essential for many custom wheel setups to ensure a smooth, safe ride. Always double-check your vehicle's hub size and wheel bore size before ordering. A small, inexpensive part that can make a big difference in your driving comfort and wheel longevity.