I claim the ornamental design for the tire tread, as shown and described.
FIG. 1 is perspective view of a tire tread showing my new design, it being understood that the tire continues uninterrupted around the entire circumference of the tire;
FIG. 2 is a front plan view thereof; and,
FIG. 3 is an enlarged view thereof.
In the drawings, the broken lines defining the sidewall, inner bead and the peripheral boundary between the claimed tire tread and the unclaimed sidewall depict environmental subject matter that forms no part of the claimed design. The solid lines following the circumference of the tire are indicate the uninterrupted schematic continuation of the tread pattern around the entire circumference of the tire.