Pneumatic tire with band cord modulus higher in side portion than in center portion of band

摘要

A band ( 14 ) of a tire covers a belt ( 12 ). The band ( 14 ) is formed by a band ply ( 36 ). The band ply ( 36 ) includes a side portion ( 38 ) and a center portion ( 40 ). A band cord having a high modulus (Ms) is used for the side portion ( 38 ). Typically, a band cord to be a composite of a nylon fiber and an aramid fiber is used for the side portion ( 38 ). A band cord having a low modulus (Mc) is used for the center portion ( 40 ). Typically, a nylon fiber is used for the band cord of the center portion ( 40 ). A ratio (Ms/Mc) is 2.0 to 4.0. A ratio of a width (Ws) of the side portion ( 38 ) to a width (Wb) of the band ( 14 ) is 5.0% to 20.0%.