Patent ID: 7595721

Claim:
A radio tag-mounting member for use in a pneumatic tire comprising: a sponge material fixed to said pneumatic tire at a rim-mounted side surface thereof or fixed to a rim at a tire-mounted side surface thereof; and a radio tag having a portion for detecting an internal state of said pneumatic tire or a portion for recording identifying information of said pneumatic tire, wherein said sponge material has a volume V 2 in a range of 0.4 to 20% of an entire volume V 1 of an inner space surrounded with said pneumatic tire and said rim; and a specific gravity in a range from 0.005 to 0.06, and wherein: said radio tag is inserted into and fixedly accommodated in an accommodating portion formed in said sponge material as a concavity or as a slit-shaped notch, one surface of said sponge material is formed as a fixed surface to be fixed to said pneumatic tire at said rim-mounted side surface thereof or to be fixed at said rim at said tire-mounted side surface thereof, with said rim-mounted side surface and said tire mounted side surface facing said inner space surrounded with said rim and said pneumatic tire mounted on said rim, a surface of said sponge material opposite to said fixed surface thereof is formed as a free surface facing said inner space, said accommodating portion of said sponge material has an opening formed on said free surface, and said radio tag is inserted into said accommodating portion from said opening and fixed thereto with an adhesive agent or by press fit; or said radio tag is fixed to a surface of said sponge material.