Heavy duty pneumatic tyre

摘要

A heavy duty pneumatic tyre comprises a tread portion (5) which is provided with wide circumferential grooves (G1) having a width Wml of 4.0 mm to 20.0 mm and narrow circumferential grooves (G2) having a width Wm2 of not less than 2.0 mm but less than 4.0 mm, and each region (R) which is defined between one of the wide circumferential grooves (G1) and the axially adjacent narrow circumferential groove (G2) is provided with axial grooves (Y) extending from the wide circumferential groove to the narrow circumferential groove to circumferentially divide the region into blocks (B1), wherein the axial grooves (Y) include variable-width grooves (Y1) the width of which increases from the wide circumferential groove (G1) to the narrow circumferential groove (G2).