Abstract: There is disclosed an improved roller skate having a shoe structure and a unitary sole plate. The sole plate has a bottom surface and an upper surface adapated to receive the shoe structure and defines a heel portion, a toe portion and an instep portion therebetween. The roller skate further includes a pair of truck assemblies secured to the bottom surface of the sole plate at the toe portion and the heel portion by fastener means including a threaded rod and a correspondingly threaded fastener. The sole platet has an aperture for receiving the threaded rod and a recess extending from the upper surface towards the bottom surface. The recess communicates with the aperture and is dimensioned for receiving and confining the threaded fastener therein beneath the shoe structure and to restrain the fastener against rotation.

Abstract: A size-adjustable high performance slip-on plastic roller skate has an injection-molded sole support piece in the form of separable front and rear sections respectively provided with wheel assemblies secured thereto. The sections are slidingly interfitted for movement toward and away from each other to vary the longitudinal extension of said sole support piece and can be locked at a plurality of the adjusted interfitted positions to enable accommodation of a plurality of shoe sizes. A metal reinforcing frame member is molded into one of said front and rear sections and extends within at least the interfitted portion of said sections, to bridge said portion at all size-adjusted positions, whereby to provide rigidity for the skate, enabling use of same in high performance applications.