Low noise level tire.

摘要

A low noise level tire 1 includes a carcass 3 composed of at least one ply toroidally extending between a pair of bead cores 6, and a tread 2 arranged radially outwardly of the carcass 3 and composed of an outer cap rubber layer Lc and an inner base rubber layer Lb. The cap rubber layer Lc is made of a rubber having a dynamic storage modulus of not less than 1.0 x 10<8> dyn/cm<2> and not more than 2.0 x 10<8> dyn/cm<2> and a loss tangent more than 0.15 and not more than 0.35. The base rubber layer Lb is made of a rubber having a dynamic storage modulus of not less than 1.2 x 10<8> dyn/cm<2> and not more than 2.2 x 10<8> dyn/cm<2> and a rate of foaming of not less than 5 % and not more than 50 %.