The ornamental design for a tire tread, as shown and described.
FIG. 1 is a perspective view of a tire tread showing my new tread design,
it being understood that the tread pattern is repeated uniformly
throughout the circumference of the tire with the opposite side being
essentially the same as for the side shown; and,
FIG. 2 is an enlarged fragmentary front elevation view of the tire tread
illustrated in FIG. 1.
In the drawings, the broken lines defining the tire inner bead and sidewall
are for illustrative purposes only and form no part of the claimed design.