| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire that can improve vibration riding performance and/or drive stability while maintaining heel and toe abrasion. SOLUTION: A tread of the pneumatic tire has a shoulder region in which a plurality of pitch kinds are dispersedly arranged in the tire circumferential direction by first pitch alignment, and a center region in which a plurality of pitch kinds are dispersedly arranged in the tire circumferential direction by second pitch alignment with a circumferential groove as a boundary. When the plurality of pitch kinds are aligned in the order of pitch lengths, and when the pitch kinds which are adjacent with each other are called as the adjacent pitch kinds, the first pitch alignment is formed by arranging the pitch kinds which are the same as the adjacent pitch kinds, or the adjacent pitch kinds in the tire circumferential direction. The second pitch alignment has a portion in which pitch kinds other than the adjacent pitch kinds are aligned in the pitch kinds which are adjacent with each other in the tire circumferential direction, and the number of continuous adjacent pitch kinds having the shortest pitch lengths is not large than three. The pitch number of the first pitch alignment is larger compared with the pitch number of the second pitch arrangement. COPYRIGHT: (C)2012,JPO&INPIT |
