Pneumatic tyre for a vehicle

The profile has extension lines (16) of elongate projections (17) formed in a surface of groove walls and/or a groove bottom. The projections project into peripheral grooves (9), and are provided at a distance from each other and behind each other in an extension direction of the grooves. The projections of one of the lines are arranged offset to the other projections of the adjacent line in the direction and by overlapping with the other projections of the adjacent line. An extension length of the projections measured in the direction is larger than an extension breadth.