The QUBE Gold bearing uses QUBE 3D SWISS technology which incorporates the best in bearing design! Using 3D modeling technology QUBE determined the perfect ball diameter, inner and outer wall thickness, and groove depth to ensure the best roller skating bearing on the market. Stronger steel is used here as well allowing a deeper groove to ensure less friction and faster roll. A special hard anodize process creates an even stronger steel, a new special oil helps keep heat down, and a double Labyrinth seal combine to make an even cleaner environment for a faster roll. The QUBE 3D Gold is the fastest rolling bearing in the line and QUBE’s most tested bearing as well.