Abstract: In-line skates, frame assemblies and assemblies for modifying in-line skates are provided. A representative assembly for modifying an in-line skate includes a grinding member configured for removable attachment to an in-line skate frame. The grinding member has a grinding sidewall and a grinding base, with the grinding base extending outwardly from the grinding sidewall. When the grinding member is attached to the frame, the grinding sidewall is positioned in an overlying relationship with respect to the first sidewall of the frame and the grinding base spans between the first and second sidewalls along the bottom of the frame.