Pneumatic tire including wave-shaped cords or filaments

摘要

A pneumatic tire includes a toroidal carcass anchored by at least a pair of bead cores and a belt having strips. The strip has as reinforcing elements a plurality of zigzag or wave-shaped cords or filaments arranged side by side around a crown of the toroidal carcass. The strip is coated with a high molecular weight material less in modulus of elasticity than the reinforcing elements. Waves of the reinforcing elements of the strips are arranged in width directions of the belt so that ratios of amplitudes to wave lengths of the waves are maximum at side edges of the belt. The ratios are preferably progressively increased toward the side edges of the belt. Ratios of amplitudes to pitches of the waves are 0.005-0.175 and ratios of pitches of the waves to maximum circumferential lengths when filled with a normal inner pressure is less than 0.025.