| 摘要 |
PURPOSE:To provide a pneumatic tire, particularly, a heavy load pneumatic tire by which partial abrasion of a tread can be restrained and durability can be improved and which is used for a truck, a bus and so on. CONSTITUTION:In this pneumatic tire, a pair of central circumferential grooves 3 are arranged in parallel with each other on a tread 1 while sandwiching the central circumferential line 2 between them, and main grooves 4 are arranged in parallel separately from each other on the tread edge sides to these central circumferential grooves 3, and a plurality of land part rows 5-7 are provided by dividing the tread 1 in the width direction. The respective land part rows 5-7 have divergently arrayed sipes 8 crossing the land part rows while inclining at an acute angle against a tire rotational direction (14) to a plane containing the tread circumferential line toward the tread edge sides from the tread circumferential line close to the central circumferential grooves 3. The sipes 8 have a blunting area where an inclination of sharpening sipe array is enlarged in the vicinity of the tread edge sides of the respective land part rows 6 and 7 situated between the central circumferential grooves 3 and the tread edges. |
