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
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 elevational view thereof; and,
FIG. 3 is a side elevational view thereof opposite to that shown in FIG. 1.
The broken line showing of environmental structure in the drawing is for
illustrative purposes only and forms no part of the claimed design.