| 摘要 |
PURPOSE: A tire with improved PRAT(Plysteer residual aligning torque) is provided to maintain block pitch arrangement applied for noise dispersion of the tire and improve PRAT unevenly generating in a circumferential direction of the tire. CONSTITUTION: A tire with improved PRAT(Plysteer residual aligning torque) arranges blocks(102) of a shoulder portion(101) in both sides on a center line(CL) of a circumferential direction of a tire tread(100). The blocks with different sizes of large, medium, and small are arranged in circumferential direction of the tire. The distance(ℓ) between the center line of the circumferential direction of the tread and each block of the shoulder portion is set differently.
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