The ornamental design for a tread for a motorcycletire, as shown and described.
FIG. 1 is a perspective view of a tread for a motorcycle tire of our new design;
FIG. 2 is a side view thereof, the opposite side view being a mirror image thereof;
FIG. 3 is a front view thereof, the top and bottom views being identical thereto, and the rear view being inverted; and,
FIG. 4 is a schematic plan view of the repetitive unit of the tread for a motorcycle tire of our new design.
The portions of elements in broken lines in FIGS. 1-4 depict environment, and form no part of the claimed design. The outer broken lines in FIG. 4 depict the boundary of the repetitive unit.