| 摘要 |
A radial ply pneumatic tire (10) features a bead (20) core which comprises an arrangement of filaments (26) positioned relative to one another. The bead core (20) has a cross- section and a radially inward base side (44), a radially outermost point or side or sides (46), an axially inward first side (48), and an axially outward second side (50). The first side (48) intersects the base side (44) at a first edge (54) and forms thereby an included angle alpha . The second side (50) intersects the base side (44) at a second edge (56) and forms thereby an included angle beta . Angle alpha is greater than or equal to beta . The bead core (20) has perimeter (42) comprising the lengths of the base (44), radially outermost, first, and second sides (46,48,50). The perimeter (42) defines a bead core area which is less than the area of an isosceles triangle having acute angles equal to alpha . The width of the bead heel surface (60) is approximately equal to the distance between a hump (80) and an axially inward surface (74) of the wheel flange (76). <IMAGE> |
