| 摘要 |
PROBLEM TO BE SOLVED: To improve the calmness of a vehicle by restricting pitch noise caused by lug grooves without changing the basic style of a tread pattern in a pneumatic tire having a rib-style tread pattern. SOLUTION: This pneumatic tire comprises a block pattern. At a part other than a belt-shaped part 14a including a straight line connecting a circumferential end P1 that is grounded first in a block 14 to a circumferential end P2 that is grounded last, a number of small holes 14h are formed. Large grounding pressure is applied to the belt-shaped part 14a while grounding pressure is lower at small hole ranges 14b and 14b where the small holes 14h are formed. COPYRIGHT: (C)2007,JPO&INPIT |
