Pneumatic tyre

摘要

A pneumatic tyre comprises a carcass ply (9) made of organic fibre cords extending continuously from one edge to the other and turned up around bead cores (4) to form a pair of turnup portions (12) and a main portion (11) therebetween, the carcass cords (13) having a difference in elongation percentage in each portion (11,12), and the difference Ea-Eb of the elongation percentage Ea in the main portion (11) from the elongation percentage Eb in the turnup portion (12) being in the range of from 0.5% to 2.0%, whereby tyre noise is reduced without sacrificing the steering stability and the like.