We claim the ornamental design for a “tire tread,” as shown and described.
FIG. 1 is a perspective view of a tire tread, showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof; and,
FIG. 5 is an enlarged fragmentary front view thereof.
The broken line showing of a tire sidewall and inner bead, including the peripheral boundary between the claimed tread portion and the sidewall, represents unclaimed environmental subject matter.