Tire with Variable Rubber Thickness and Shoulder Reinforcement

The reinforcing structure is segmented into distinct functional zones: standard crown reinforcement in the central area and additional circumferential reinforcing layers specifically positioned in the shoulder regions. This segmentation allows the tire to have enhanced strength where needed (shoulders under cyclical stress) while maintaining simpler construction in less critical areas, thus resolving the contradiction between strength improvement and complexity increase.

Additional circumferential reinforcing layers are applied locally only in the shoulder regions rather than uniformly across the entire tire. This local quality approach provides targeted reinforcement where cyclical stresses are most severe during mounting/dismounting operations, improving resistance to fatigue without unnecessarily increasing overall structural complexity and manufacturing difficulty.

The rubber compound is formulated with locally variable thicknesses, specifically thicker layers positioned at critical locations inside the carcass reinforcement where crack initiation and propagation are most likely. This local quality approach enhances durability in high-stress regions while accepting that manufacturing precision requirements are increased, as the variable thickness profile demands more sophisticated molding and quality control processes.

Thicker rubber compound layers are strategically placed beforehand in regions prone to crack development, creating a cushioning effect that prevents crack initiation and propagation. This prior cushioning approach improves reliability by preemptively addressing weakness points, though it necessitates higher manufacturing precision to ensure the thicker sections are positioned accurately during tire construction.