The ornamental design for a tire tread, as shown and described.
FIG. 1 is a front right perspective view of a tire tread, showing my new
design, it being understood that the tread pattern repeats uniformly
throughout the circumference of the tread;
FIG. 2 is a front elevational view thereof; and,
FIG. 3 is a side elevational view thereof, the opposite side elevational
view being a mirror image thereof.
The broken line showing of the tire sidewall in the drawings is for
illustrative purposes only and forms no part of the claimed design.