The ornamental design for a tire tread and buttress, substantially as shown and described.
FIG. 1 is a perspective view, partly schematic, of a tire tread and
buttress showing my new design, it being understood that the pattern is
repeated throughout the circumference of the tire tread and buttress, and
the buttress pattern is repeated on the opposite side; and
FIG. 2 is a front elevational view, partly schematic, thereof.