Powerslide Swell in-line skates are designed for all fitness riders. The line of skates was designed to create high quality and powerful roller skates specifically for intense fitness training. In skates you will feel great and also look good. Swell Skates are designed especially for fitness skating and fitness training. Skeleton: Composite fiber shell Chassis: Unity one piece 3x110mm Wheels: Infinity 110mm 86A Bearings: WCD ABEC 7 FS