The ornamental design for a tire tread, as shown and described.
FIG. 1 is a first perspective view of a tire tread showing our new tread
design, it being understood that the tread pattern is repeated uniformly
throughout the circumference of the tire;
FIG. 2 is an opposite side perspective view thereof; and,
FIG. 3 is an enlarged fragmentary front elevation view of the tire tread
illustrated in FIGS. 1 and 2.
The broken line showing of a tire sidewall and inner bead is for
illustrative purposes only and forms no part of the claimed design.