| 摘要 |
A heavy duty pneumatic tire (1) comprises a tread portion (2) provided with a plurality of blocks (5) divided by a plurality of main grooves (3) and a plurality of lateral grooves (4); the main grooves (3) extend in the tire circumferential direction and each have a width in a range of from 5 to 13 mm; the blocks (5) including a siped block provided with at least one sipe (13) extending axially across the entire width thereof to circumferentially subdivide the block into at least two block pieces (14); the at least two block pieces (14) include at least one holed block piece (14A) provided with at least one small hole (21); each small hole (6) extends radially inwardly from the ground contacting top surface of the holed block piece to its bottom at a depth in a range of from 30 to 100 % of a depth of the main grooves (3); each small hole (6) has a round cross-sectional shape to have a maximum radius in a range of from 0.6 to 2.0 mm at the opening of the small hole in the ground contacting top surface, wherein the total opening area of the at least one small hole (6) is 2 to 12 % of the overall area of the ground contacting top surface. |
