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 our 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;
FIG. 3 is a fragmentary side elevation view thereof.
The broken line showing of environmental structure in FIGS. 1 and 3 of the
drawing is for illustrative purposes only and forms no part of the claimed
design.