Assertion: pneumatic radial tire | /r/HasProperty | a bead filler
Facets:
Source sentences:
text: That is, the present invention provides a pneumatic radial tire including a bead core which is buried in a bead portion; a bead filler which is arranged in an outer side in a tire diametrical direction of the bead core; a carcass ply which is wound up from an inner side to an outer side in a tire width direction around the bead core so as to sandwich the bead filler; a steel protection layer which is arranged along an outer side of the carcass ply in the bead portion, and is wound up from the inner side to the outer side in the tire width direction around the bead core; and an organic fiber protection layer which is arranged along an outer side of the steel protection layer in the bead portion, and is wound up form the inner side to the outer side in the tire width direction around the bead core, wherein the bead filler is constructed by a first bead filler which is arranged in adjacent to the bead core, and a second bead filler which is arranged in an outer side in the tire width direction of the first bead filler, wherein a reinforcing rubber is provided in an outer side in the tire width direction of the second bead filler so as to sandwich a wind-up end of the steel protection layer and a wind-up end of the organic fiber protection layer, wherein a relationship of 1≤A/B≤2 is satisfied between a width A from the wind-up end of the steel protection layer to a tire inner surface in a parallel direction to a normal line of the tire inner surface which passes through the wind-up end of the steel protection layer, and a width B from the wind-up end of the steel protection layer to a tire outer surface in a parallel direction to the normal line, wherein the wind-up end of the carcass ply is covered with a ply cover member, and wherein a relationship of 0.8≤D/C≤1.2 is satisfied between a thickness C of the second bead filler which is positioned between the ply cover member and the first bead filler, and a thickness D of the reinforcing rubber which is positioned between the ply cover member and the steel protection layer.