Tire tread and buttress
FIG. 1 is a front elevational view of a tire tread and buttress showing my new design; 
     FIG. 2 is a perspective view thereof; 
     FIG. 3 is a side elevational view thereof the opposite side being a mirror image of that shown; 
     FIG. 4 is an enlarged fragmentary front view thereof; 
     FIG. 5 is a front elevational view of a tire tread and buttress showing another embodiment of my design; 
     FIG. 6 is a perspective view of FIG. 5; 
     FIG. 7 is another perspective view of FIG. 5; and, 
     FIG. 8 is an enlarged fragmentary front view of FIG. 5. 
     The pattern is understood to be repeated uniformly throughout the circumferences of both embodiments of the tire tread and buttress and the solid line segments between the outer edges of the shoulder ribs are for the purpose of defining the peripheral boundary of the tread and buttress and form no part of the claimed design. 
     The broken line showing of the tire sidewall in all views of the drawing is for illustrative purposes only and forms no part of the claimed design.