Roller skate for use with boot, has four oblong drills in which wheels of three different diameters are inserted, and eyelets rotated by certain degrees to select wheels of particular diameters for particular operation mode

摘要

The skate (1) has four oblong drills (3) in which wheels (2, 2`, 2``) of three different diameters are inserted. Eyelets (4) are inserted in the drills, and are rotated by 180 degrees in order to select the wheels of particular diameters for a particular operation mode selected from street mode, free ride mode and fitness mode. An H-block made of paraffin material is placed at the center of the skate.