| 摘要 |
A low pressure all terrain vehicle tire 10 features a strapped bead core 20 which comprises distinct layers 30,32,34,36 of filaments 26 positioned relative to one another. The bead core 20 has a substantially square or rectangular cross-section and a radially inward substantially flat base side 44, a radially outermost side 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 equal to beta . The bead core 20 has perimeter 42 comprising the lengths of the base 44, radially outermost 46, first 48, and second 50 sides. The perimeter 42 defines the bead core area. 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. The bead core base side 44 has a width in the range of 65% to 90% of the rim seat width W and a radially inner diameter about equal to the diameter of the rim hump 80. The bead heal surface 60 has a width in the range of 80% to 125% the rim seat width W. |
