The ornamental design for a tire tread, as shown and described.
FIG. 1 is a perspective view of a tire tread showing my new design, it
being understood that the pattern is repeated uniformly throughout the
circumference of the tread;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a side elevational view thereof, the opposite side elevational
view being a mirror image thereof; and,
FIG. 4 is an enlarged fragmentary front view thereof.
In the drawings, the broken lines defining the tire inner bead and the
peripheral boundary between the tire tread and the sidewall are for
illustrative purposes only and form no part of the claimed design.