| 摘要 |
PROBLEM TO BE SOLVED: To reduce a tire noise without impairment of a wet property and steering stability. SOLUTION: A wide longitudinal groove 9 continuously extending on a tire equator C and having a groove width of 35 to 45 mm is formed on a tread surface 2a. Each of right and left tread surfaces between a groove edge 9b of the wide longitudinal groove 9 and a grounding end E of the tread surface 2a is equally divided into three pieces, and assumed as a first area A1, a second area A2, and a third area A3 from the inside in a tire shaft direction. The land ratio La of the first area A1 is made to be not less than 90%. The land ratio Lb of the second area A2 is made to be 80 to 90%. The land ratio Lc of the third area A3 is made to be 85 to 95%. The first area A1 has a land portion 10 wherein a groove having a substantial groove width is not formed is provided in a range of 10 mm from the groove edge 9b to the outside in the tire shaft direction. |
