| 摘要 |
PURPOSE: A low rolling resistance tire is provided to balancingly realize rolling resistance, handling, and comfortableness. CONSTITUTION: A low rolling resistance tire(1) for vehicles comprises at least one belt layer(7) coaxially extending around at least one carcass layer(3), a composite tread(10) coaxially extending around the belt layer(7) and comprising a radially outer layer(12) an a radially inner layer(11), wherein the ratio between the modulus of elasticity E' at 70 deg.C of the radially inner layer and the modulus of elasticity at 70 deg.C of the radially outer layer is comprised between 1.1 and 3, and the ratio between the value of tang delta at 70 deg.C of the radially inner layer and the value of tang delta at 70 deg.C of the radially outer layer is lower than 0.8. Advantageously, the tire(1) achieves a better compromise between the characteristics of rolling resistance, handling and comfort with respect to what is obtainable from known tires for the same type of use. |
