| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire allowing noise reduction outside a car compatible with traveling performance on snow and off-load performance. SOLUTION: A plurality of main grooves 1 in which long grooves 1a are connected to short grooves 1b via bent parts 1c in a dogleg shape are respectively disposed on a tread surface so as to arrange the bent parts 1c on a center part and incline at least the long grooves 1a relative to a tire circumferential direction. The groove width Wm of the main groove 1 is set in the range of 3% to 10% of a tread development width W, a bent angleθ1 in a narrow angle side of the bent part 1c is set in the range of 90 deg. to 160 deg. and an inclined angleθ2 relative to the tire circumferential direction of the long groove 1 is set in the range of 30 deg. to 60 deg.. A maximum air pressure specified in the JATMA in 1998 is filled in this pneumatic tire, and the main groove 1 opens only either a ground contact front end Gf or a ground contact back end Gr in a ground contact surface G at the time of applying load of 75% of a maximum load capacity. |
