Radial ply pneumatic tire

A radial ply pneumatic tire having a nominal rim diameter NRD, an axis of rotation, a tread having a pair of lateral edges, a pair of reinforcing belts located radially inward of the tread, a pair of sidewalls, one sidewall extending radially inwardly from each lateral edge, a maximum section width, a maximum section height, and a tire carcass structure, the tire carcass structure comprising:

• a) a pair of bead portions, one bead portion extending radially inwardly from each sidewall, each portion including a substantially inextensible core;
• b) a carcass reinforcing structure radially inward of the reinforcing belts extending circumferentially about the tire from one bead portion to the other bead portion, the carcass reinforcing structure having a first ply and a second ply, each ply having an elastomeric ply coat, each ply having a pair of turnup ends, one turnup end of each ply being wrapped about each bead core and extending axially and radially outwardly, the turnup ends of either the first ply or the second ply or both the first and second plies terminating radially in proximity to the radial location of the maximum section width of the tire;
• c) a bead filler adjacent to the bead core and extending radially outward from the bead core in each bead portion into the sidewall gradually decreasing in cross-sectional width and terminating a distance G from the nominal rim diameter of at least 25% of the maximum section height of the tire;
• d) two cord reinforced members located between the bead filler and the second ply turnup in each bead portion, an axially outer member and an axially inner member, the two cord reinforced members each having a first end and a second end, the first end being axially and radially inward of the second end and the two cord reinforced members each increasing in radial distance from the axis of rotation of the tire as a function of distance from its first end, the first end of the axially outer member being radially above an axially outer edge of a radially inner surface of the bead core and the first end of the axially inner member being radially above the first end of the axially outer member and located radially about 1 cm above the axially outer edge of the radially inner surface of the bead core, the cords of the two members being equally but oppositely inclined in the range from 25.degree. to 75.degree. relative to the radial direction, and wherein the second end of each cord reinforced member is located radially between the termination of the second ply turnup end and the termination of the first ply turnup end;
• and
• e) in each bead portion a fabric reinforced member integral of the bead portion, the fabric reinforced member having first and second ends, the fabric reinforced member being wrapped about the first and second plies and the bead core, both the first and second ends of the fabric reinforced member radially extending above the bead core.