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 throughout the circumference
thereof.
FIG. 2 is a front elevational view thereof;
FIG. 3 is a side elevational view thereof; and,
FIG. 4 is an enlarged fragmentary front view thereof.
The broken line showing of the tire sidewall in FIGS. 1, 2 and 3 of the
drawing is for illustative purposes only and forms no part of the claimed
design.