Vehicle tire air pressure detecting device and cast wheel for mounting the device

摘要

A rim drop section (64) dented in a shape of a ring is provided on an inner side of a bead seat section (62) of a rim (53) for holding a bead section of a tire, further, a recessed section (54) is provided on this rim drop section (64), and to this recessed section (54) a detecting device main body (51) of a tire air pressure detecting device (41) is accommodated. When a tire is assembled on a cast wheel (25) by utilizing a tire changer or the like, or when the tire is removed from the cast wheel (25), the bead sections of the tire are prevented from interfering with an air pressure sensor (41), and damaging of the air pressure sensor (41) is prevented.