A rim for a spoked bicycle wheel having a tubeless tire comprises a continuous outer circumferential wall without any holes or openings, and a plurality of supports for nipples for tightening the spokes, the said supports supporting the nipples outside the section making up the rim. The switch has electrodes associated with both the fixed and moveable contacts for providing an electrostatic switch operation and piezoelectric material with associated electrodes for bending the armature upon application of an electric voltage and providing an initial piezoelectric switch operation followed by electrostatic switching and clamping. Alternatively, even number of network circuits are formed on the surface of the insulating substrate and the terminals are arranged on the side edges of the insulating substrate point-symmetrically with respect to the center of the surface of the insulating substrate.