The ornamental design for a tyre tread, as shown and described.
FIG. 1 is a perspective view of a tyre tread according to the present design, it being understood that the tread pattern is repeated throughout the circumference of the tyre tread;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left lateral view thereof;
FIG. 5 is a right lateral view thereof;
FIG. 6 is an enlarged fragmentary front view taken from FIG. 2 showing the details of the tread portion thereof; and,
FIG. 7 is a cross section view taken from the cut line 7-7 in FIG. 6.
The broken lines defining the sidewall, inner bead, and the peripheral boundary between the claimed tyre tread and the sidewall depict environmental subject matter that forms no part of the claimed design.