The ornamental design for a tire tread and buttress, substantially as shown and described.
FIG. 1 is a perspective view of a tire tread and buttress showing my new
design it being understood that the tread pattern is repeated throughout
the circumference of the tire tread and buttress, the opposite side being
substantially the same as that shown;
FIG. 2 is a front elevational view thereof; and
FIG. 3 is a side elevational view thereof.
The broken lines in the drawing are understood to be for illustrative
purposes only.