探讨轻型载重汽车子午线轮胎胎圈裂的解决措施。对三角胶配方进行优化设计,在保持原配方胶料物理性能的前提下,改善胶料的动态屈挠龟裂性能,延长疲劳寿命;对胎圈的施工设计进行调整,加大胎圈宽度,降低三角胶高度,相对加大胎侧的承受屈挠部位,避免应力向胎圈下移。轮胎的耐久寿命有所延长,胎圈裂问题有效解决。 Discussion on the solution to bead crack of radial truck radial tire. On the premise of maintaining the physical properties of the original compound, the dynamic flexural cracking performance of the compound is improved and the fatigue life is prolonged. The bead construction design is adjusted to increase the bead width, Reduce the height of apex, the relative increase of the sidewall flexor parts to avoid stress down to the bead. Tire durability has been extended, the problem of bead cracking effectively resolved.