| 摘要 |
PURPOSE:To enhance the running performance on an ice-bound road and also the sipe durability of a pneumatic tire in bias structure by locating the end of an inclined tread element in its circumferential direction within a specified range on both sides of the equator, and by forming a sipe at a specified inclina tion angle and intersecting the inclination of the thread element. CONSTITUTION:The end of at least one tread element 4 in its circumferential direction is located in the grounding surface region M in the part 10-30% of the tread spread width TDW on both sides in the width direction FF' from the tire equator l, and at the end in its circumferential direction, a sipe 5a is provided in an inclination of 40 deg.+ or -10 deg. to the tire circumferential direction EE'. In the central region of the tread element 4 in its circumferential direction, another sipe 5a is provided which is inclined 90 deg.+ or -20 deg. to the tire circumferential direction EE'. This enhances stability in running on the road covered with ice or snow, braking and driving characteristics, and resistance against eccentric wear and also enhances anti-cracking property of the sipe. |
