Skates are seated on a Unity frame, which is 9.8 (249mm) inches long and is fixed with 2 screws. xml: namespace prefix = "o" ns = "urn: schemas-microsoft-com: office: office" /> The model is powered by Infinity 90mm with 85A hardness. Powerslide Radon Men 90 inline skates feature Wicked ABEC 5 bearings. They have a solid steel cage and 7 steel balls that are perfectly matched to ensure the lightest torque. Kyodo Japanese oil was used in the production of bearings. The Height Adjustable Brake System (HABS) offers plenty of advantages over conventional foot brakes. The height adjustment function is ideal for finding your preferred personal braking position. The braking surface has a larger contact area.