The ornamental design for a tire tread, as shown and described.
FIG. 1 is a top plan view of a tire tread showing our new design, it being
understood that the tread has been broken away in the middle to indicate
indeterminate length;
FIG. 2 is a greatly enlarged fragmentary top plan view thereof;
FIG. 3 is a cross-sectional view of the tire tread taken at line 3--3 of
FIG. 2; and
FIG. 4 is an enlarged perspective view thereof formed into a ring as it
would appear attached to a tire carcass.