The ornamental design for a tire tread, as shown and described.
FIG. 1 is a perspective view of a tire tread in accordance with an embodiment of the present invention. It is to be understood that the tread pattern repeats circumferentially throughout the outer circumference of a tire.
FIG. 2 is a side view of the tire tread of FIG. 1.
FIG. 3 is a front view of the tire tread of FIG. 1.
FIG. 4 is an enlarged fragmentary front view of a portion of the tire tread pattern of FIG. 1; and,
FIG. 5 is an enlarged fragmentary perspective view of a portion of the tire tread pattern of FIG. 1.
The broken lines showing tread recesses and the tire sidewall and inner bead depict environmental subject matter only and form no part of the claimed design.