| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pneumatic tire which improves the rigidity of land part formed on a tread surface, and can prevent increase of level of abnormal noise when the tread surface is worn. <P>SOLUTION: In a pneumatic tire, a plurality of land parts 14 partitioned by a plurality of groove parts 9, 10, 13a, 13b are formed on the tread surface 6. The groove parts are equipped with main grooves 9, 10 extending along the tire circumferential direction or crossing in the tire circumferential direction, sub grooves 13a, 13b extending by communicating to the main grooves 9, 10, a pair of bottom-up parts 11 formed near both ends of parts partitioning the land part 14 of the sub grooves 13a, and at least one bottom-up part 12 formed between the bottom-up parts 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
