Patent ID: 8905102

Claim:
A pneumatic radial tire comprising: a bead core which is embedded in a bead portion; a rubber filler which is arranged in an outer side in a tire diametrical direction of the bead core; a carcass ply which is wound up to an outer side from an inner side around the bead core; and a chafer which is wound up around the bead core so as to be arranged in an outer side of the carcass ply; wherein the rubber filler includes a lower filler surrounding the bead core and having a round cross sectional shape, the lower filler having an upper end in the tire diametrical direction, the upper end being located away from the carcass ply, and an upper filler in contact with the lower filler, the upper filler being arranged in the outer side in the tire diametrical direction of the lower filler and having a lower rubber hardness than the lower filler, wherein the chafer includes a metal cord, and a wound-up end of the carcass ply is arranged in an outer side in the tire diametrical direction than the upper end of the lower filler and a wound-up end of the chafer, and wherein a rubber pad having a higher rubber hardness than the upper filler is provided in such a manner as to sandwich the wound-up end of the carcass ply, and the rubber pad extends in contact with the wound-up end of the carcass ply along an inner side thereof to an inner side in the tire diametrical direction than the upper end of the lower filler.