Tire noise reduction device

A pneumatic tire comprising:

• an inner liner layer adhered to an inner circumferential surface of the tire;
• and
• a tire noise reduction device including:
• an annular noise absorbing member which is made of a porous material;
• and
• a protective layer for preventing the annular noise absorbing member from being damaged due to friction between the annular noise absorbing member and the inner liner layer, wherein the protective layer is made of a thermoplastic elastomer composition obtained by dispersing an elastomer in a thermoplastic resin and arranged on an outer circumferential surface of the annular noise absorbing member, wherein the protective layer covers the entire outer circumferential surface of the noise reduction device, is commensurate in width with the noise absorbing member, and lies between the inner liner layer and the noise absorbing member, wherein a maximum outer circumferential length of the protective layer is set at 95.5% to 99.8% of a maximum inner circumferential length of a tread part of a tire in which the tire noise reduction device is installed,
• wherein the thermoplastic resin of the protective layer and a matrix resin of the inner liner layer are formed of the same material, thereby making static electricity, due to friction between the protective layer and the inner liner layer, less likely to occur,
• wherein the protective layer is adhered to an outer circumferential surface of the annular noise absorbing member, and
• wherein the tire noise reduction device is merely placed along the inner liner layer, without being bonded to the inner liner layer.