The ornamental design for a tread of a tire, as shown and described.
FIG. 1 is a perspective view of the tread of a tire of the present
invention, it being understood that the pattern is repeated uniformly
throughout the circumference of the tread; and,
FIG. 2 is an elevational view of the tread of the tire shown in FIG. 1.
In FIG. 1, the broken lines defining the inner bead and sidewall are for
illustrative purposes only and form no part of the claimed design.
In the drawings, the dark stippled surface shading represents the recessed
portion of the tread grooves, having a depth as best shown along the
central right edge of FIG. 1.