Pneumatic tire for heavy vehicle has crown block thickness reducing towards edges and tread width greater than 90 per cent of maximum axial tire width

摘要

Tire (1) having a radial carcass reinforcing layer (2) and two or more crown reinforcing layers (4) with crossing filaments inside its tread (5), is made with the thickness of its crown block reducing from the center of the tread to its outer shoulders (6) and a tread width that is greater than 90 per cent of the maximum axial tire width. Tire (1) having a radial carcass reinforcing layer (2) and two or more crown reinforcing layers (4) with crossing filaments inside its tread (5), is made with the thickness of its crown block reducing from the center of the tread to its outer shoulders (6) and a tread width that is greater than 90 per cent of the maximum axial tire width. The aspect ratio (H/S) of the tire is under 0.8 and preferably below 0.6 to 1, where H is the height of the tire from the wheel rim and S its maximum width and the difference between the axial width of the tread and that of the crown layer is preferably below 15 mm. The tire crown reinforcement consists of at least two circumferential layers, at least one of which is narrower than the others.