The ornamental design for a pneumatictire tread and buttress, substantially 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 a greatly enlarged sectional view of the tread and butress, taken
substantially as indicated by line 3--3 of FIG. 2.