The ornamental design for a tread for pneumatictire, as shown and described.
FIG. 1 is a perspective view of a tread for pneumatic tire according to our new design, it being understood that the tread pattern repeats circumferentially about the outer circumference.
FIG. 2 is a side elevational view thereof, the opposite side being a mirror image thereof; and,
FIG. 3 is a front elevational view thereof.
The broken line disclosure of the tire sidewall depicts environmental subject matter that forms no part of the claimed design.