The ornamental design for a pneumatictire tread and buttress, as shown and described.
FIG. 1 is a first 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 an enlarged fragmentary front elevational view thereof.
The broken line showing of environmental structure in FIG. 1 of the drawing
is for illustrative purposes only and forms no part of the claimed design.