Pneumatic tyre

摘要

A pneumatic tyre comprises the following belt (A) or belt (B). The belt (A) comprises a ply (20) made of waved monofilament steel cords (10) and a ply (21) made of multi-filament steel cords (11), wherein the waved monofilament steel cord (10) is (1) spirally waved so that the wave pitches PA are in a range of from 14 to 50 mm and the amplitude HA of each wave is in a range of from 0.002 to 0.02 times the pitch PA of the wave, or (2) two-dimensionally waved so that the wave pitches PB are in a range of from 5 to 50 mm, and the amplitude HB of each wave is in a range of from 0.002 to 0.05 times the pitch PB of the wave. The belt (B) comprises two plies (20,20) made of waved monofilament steel cords (10), wherein the waved monofilament steel cord (10) is waved so that the wave pitches P are in a range of from 0.008 to 0.03 times the circumference of the tyre and the wave height of each wave is in a range of from 0.002 to 0.025 times the pitch P of the wave.