The ornamental design for a pneumatictire tread and buttress, as shown and described.
FIG. 1 is a perspective view, partly schematic, of a pneumatic tire tread
and buttress embodying my new design, it being understood that the pattern
is repeated throughout the circumference of the tread and buttress, as
shown schematically by solid lines, and that the buttress pattern is
repeated on the opposite side;
FIG. 2 is an enlarged, fragmentary developmental plan view of the tread and
buttress of FIG. 1; and
FIG. 3 is an enlarged sectional view of the tread and buttress, taken
substantially as indicated by line 3--3 of FIG. 2.