Vehicle tire and tire tread band

A vehicle tire (1) including a tread layer (2) that is meant for a rolling contact against a ground surface, said tread layer (2) being provided with a tread pattern (20) comprising circumferential (25) and transversal grooves (26), in between of which grooves (25) there are formed tread blocks (22) provided with sipes (27). At least part of the sipes (27), are made to be undulating in the lengthwise direction of the sipe (27), so that in the sipe (27), there are sequentially formed at least two main surfaces (272A, 272B) spaced apart by a distance (C), and in between said surfaces there is arranged a transfer zone (272C), so that in adjacent main surfaces (272A, 272B), there are formed locking elements (28), which in the other wall (271) of the sipe (27) are made as a rotation symmetrical frusto-conical bracket (281) and in the other wall (271) as a rotation symmetrical frusto-conical recess (282), and that said bracket (281) and recess (282) are matched together, when the sipe walls (271) are pressed together in a usage situation. The invention also relates to a corresponding tread band and a tool for producing the sipe.