The ornamental design for a pneumatictire tread and buttress, as shown and described.
FIG. 1 is a front elevation view of a pneumatic tire tread and buttress
showing my new design, it being understood that the pattern is repeated
uniformily throughout the circumference of the tread and buttress;
FIG. 2 is a right side elevational view of FIG. 1; and,
FIG. 3 is a left side elevational view of FIG. 1.
The broken line showing of environmental structure in FIGS. 2 and 3 of the
drawing is for illustrative purposes only and forms no part of the claimed
design.