The ornamental design for a shoulder of a tire, as shown and described.
FIG. 1 is a perspective view of a shoulder of a tire showing my new design, it being understood that the shoulder pattern is repeated circumferentially throughout the lateral portion of a tire tread and a radially outer sidewall portion of a tire defining the shoulder of a tire, the opposite side perspective view being identical thereto;
FIG. 2 is an enlarged fragmentary front elevation view of the tire of FIG. 1 showing my new shoulder pattern in more detail;
FIG. 3 is a left side elevation view of the tire showing the shoulder of a tire thereof; and,
FIG. 4 is a right side elevation view of the tire showing the shoulder of the tire thereof.
In the drawings, the dark stippled shading represents groove areas of the shoulder surfaces being recessed portions of the shoulder of the tire. The broken line disclosure of the tire crown, tire sidewall and inner bead is for illustrative purposes only and forms no part of the claimed design.