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