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