The ornamental design for outer casing mounted around a suspensionrod, as shown and described.
FIG. 1 is a perspective view of a outer casing mounted around a suspension
rod showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof; and,
FIG. 4 is a front elevational view thereof; the opposite side being a
mirror image of the shown; and is a left side elevational view thereof;
and the right side being a mirror image of that shown.