The ornamental design for a steppad of a step bar for vehicles, as shown and described.
FIG. 1 is a front perspective view of a step pad of a step bar for vehicles of the present invention;
FIG. 2 is a top view of the step pad shown in FIG. 1;
FIG. 3 is a bottom view of the step pad shown in FIG. 1;
FIG. 4 is a front view of the step pad shown in FIG. 1;
FIG. 5 is a rear view of the step pad shown in FIG. 1; and,
FIG. 6 is a side view of the step pad shown in FIG. 1 with the other side being a mirror image.
The ornamental design which is claimed is shown in the solid lines in the drawings. The broken lines shown in the drawings are for the purpose of illustrating environmental structure and form no part of the claimed design.