The design for a skateboardrack, as shown and described.
FIG. 1 is an isometric view of a skateboard rack showing the new design.
FIG. 2 is a front view of the design of FIG. 1, the rear view not forming part of the claimed design.
FIG. 3 is a right side view of the design of FIG. 1.
FIG. 4 is a left side view of the design of FIG. 1; and,
FIG. 5 is a top view of the design of FIG. 1, the bottom view not forming part of the claimed design.
The shading lines shown in the drawings represent the three-dimensional contour of the presently claimed design and are not intended to indicate surface decoration. The dashed lines shown in the drawings indicate portions of the design that are not presently claimed and thus form no part of the presently claimed design.