The ornamental design for a pneumatictire tread and buttress, as shown and described.
FIG. 1 is a perspective view of a pneumatic 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 elevational view thereof; and,
FIG. 3 is a fragmentary side elevational view thereof.
The broken line showing of environmental structure in FIGS. 1, 2 and 3 of
the drawing is for illustrative purposes only and forms no part of the
claimed design.