针对１１．００—２０载重轮胎出现肩空和胎圈爆破质量问题，采取适当措施：胎面花纹沟深度由１７ｍｍ减至１５ｍｍ，胶帘布厚度由１．１５ｍｍ减至１．１０ｍｍ，缓冲层宽度减少４０－５０ｍｍ，胎圈着合直径由５１３ｍｍ改为５１１ｍｍ，并在胎圈部增加排气线，增加胎圈底部刚性，并对工艺技术等方面做了适当调整与改进。改进后轮胎重量减轻ｓ．ｓｋｇ。经室内、外试验及实际使用证明，改进措施是行之有效的，肩空和胎圈爆破占退赔胎的比例由９７，７８％减到６５．８２％，退赔率系数（１９８８年为１）为０．４６。 In view of shoulder shoulder and burst quality problems of 11.00-20 truck tires, appropriate measures were taken: the tread groove depth was reduced from 17mm to 15mm, the thickness of the rubber cord was reduced from 1.15mm to 1.10mm, and the width of the buffer layer was reduced 40-50mm. The diameter of the bead is changed from 513mm to 511mm, and the exhaust line is added in the bead portion to increase the rigidity of the bottom of the bead, and proper adjustments and improvements are made to the technology and the like. Improved rear tire weight reduction. skg. The indoor and outdoor tests and practical use proved that the improvement measures were effective. The ratio of shoulders and bead blasts to retreat was reduced from 97,78% to 65.82% ) Is 0.46.