Pneumatic tire having a high ending, turnup locked bead construction

摘要

The turn-up portion of the carcass ply (12) in the bead portion of a pneumatic tire is interposed between the bead core (11) and a toe guard (18), and extends a substantial distance toward the maximum section width of the tire. The bead core (11) has a radial cross section which is substantially pentagonal. The toe guard (18) comprises a rubber material, a flexible textile material or a heat shrinkable material that protects the toe portion of the tire. Elastomeric stiffening member or chafer (20) may be disposed on each side of the carcass ply (12) in the bead portions and lower sidewalls of the tire. The assembly of a tire according to the invention mounted upon a specified rim (22) is also disclosed.