The ornamental design for a tire tread, as shown and described.
FIG. 1 is a side perspective view of a tire tread showing my new design, it
being understood that the tread pattern is repeated throughout the
circumference of the tire tread, the opposite side being the same as that
shown;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a side elevational view of the right side thereof, the opposite
side being identical thereto; and,
FIG. 4 is an enlarged fragmentary perspective view thereof.
The dark stippled surface shading represents the recessed portion of the
tread grooves, having a depth as best shown in FIGS. 2 and 4; the broken
lines defining the tire sidewall and inner bead and the peripheral
boundary between the tire tread and sidewall are for illustrative purposes
only and form no part of the claimed design.