The ornamental design for a surfacedesign for a pneumatic tire, as shown and described.
FIG. 1 is a view of the lateral surface of a pneumatic tire with the ornamental surface design in an environment of use; and,
FIG. 2 is a detailed view of the ornamental surface design of FIG. 1.
The broken line perimeter structure that is shown in FIGS. 1 and 2 surrounding the design indicates the boundaries of the claim and forms no part of the claimed design. The additional broken lines in FIG. 1 represent environmental subject matter and form no part of the claimed design.