| 摘要 |
PURPOSE:To improve resistance to partial wear along with resistance to normal wear by arranging each different rubber composite on the central part and the peripheral part of each block, etc., formed on the tread part, and setting the thickness and dynamic modulus of elasticity, etc., at room temperature of these rubber composites in specified ranges respectively. CONSTITUTION:With a pneumatic tire, main grooves are cut in a tread to divide the tread and form plural blocks 1, etc., on the tread part. In this case, a rubber composite part which differs from that of the central part 2 is applied to the peripheral part 3 of each block 1, etc., with the thickness of 0.3-10mm. At room temperature, dynamic modulus of elasticity of the rubber composite on the central part 2 is set at 60-140kgf/cm<2>, and dynamic modulus of elasticity of the rubber composite on the peripheral part 3 is set at 110-190kgf/cm<2>. Further, a value obtained by subtracting the dynamic modulus of elasticity of the rubber composite on the central part 2 from the dynamic modulus of elasticity of the rubber composite on the peripheral part 3 is set to 10-90kgf/cm<2>. |
