This construction improves the tire's load and driving durability by maintaining the ideal tire shape under the load and driving pressure affecting the model. The better durability upgrades the load carrying and withstanding ability, without allowing the tire's shape to deform under the pressure. As a result, the tire significantly enhances the load capacity. This stronger structure also enables the tire to prevent damage to the casing. It resists punctures, impact and other damage from damaging the casing and shortening the tire's usability.