The ornamental design for a tire tread and buttress, 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 pattern is repeated throughout the
circumference of the tread and buttress, the opposite side being
substantially the same as that shown;
FIG. 2 is a front elevation view thereof; and,
FIG. 3 is an enlarged fragmentary side elevational view thereof.
The broken line showing of environmental structure in FIGS. 1 and 3 of the
drawings is for illustrative purposes only and forms no part of the
claimed design.