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, it
being understood that the tead pattern is repeated uniformly throughout
the circumference of the tire tread, as shown schematically in solid
lines.
FIG. 2 is an enlarged fragmentary front elevational view thereof; and,
FIG. 3 is a side elevational view of the design of FIG. 1, the opposite
side elevational view being identical thereto.