several embodiments of open and closed loop frames substantially elliptical in shape are disclosed for in - line skates . some embodiments include independent suspension for each wheel . the frame is flexible to provide shock absorption and rebound . the frame stiffness increases with the applied load . the rocker of the skate is made to vary with the applied load , so that the skate has high maneuverability yet is very stable when gliding . the frame includes a boot mounting system which adds no stress concentrations , thus assuring even flex properties over the entire frame , and high durability . overload protection is included to further enhance durability .