| 摘要 |
A tread portion of a pneumatic tire includes inner land portions between outer circumferential main grooves and being divided into inner blocks by inner lateral grooves inclined at an angle ± of 10 to 40°. The inner lateral grooves consist of first inner lateral grooves and second inner lateral grooves which are alternately arranged in a circumferential direction. The first inner lateral grooves include a wide-width part and a narrow-width part wherein a groove depth of the narrow-wide part is smaller than a groove depth of the wide-width part . The second inner lateral grooves have a constricted part on a center side in a groove length direction and respective outer widened parts. |
