It walks below the detachably connected bottom (101) of roller-skating shoe system semicircular and external fixation system (100) includes pair of sliding device (1), with curved profile (2), therefrom connector (3) outstanding has at least one slot (3a to each the pair of skating shoes ice skate blade (1), 3b) stretch out, the external fixation system (100) of opening semi-ring (101) and second end (6) that the system also includes connector (4) there are first end (5) to be configured for connection in bottom are connected to the slot (3a equipped with a hole (7), 3b) in connector (3) skating boots (1).
