The ornamental design for a tire tread, as shown and described.
FIG. 1 is a perspective view of a tire tread showing my new design, it
being understood that the tread pattern is repeated throughout the
circumference thereof as shown schematically by solid lines; and,
FIG. 2 is an enlarged fragmentary developed plan view thereof.
The broken line showing the tire sidewall in FIG. 1 of the drawings is for
illustrative purposes only and forms no part of the claimed design.