| 摘要 |
PURPOSE:To aim at lowering noise from a tire, by providing such an arrangement that shoulder transverse grooves which are positioned outside of a vehicle when the tire is installed on the vehicle, and center transverse grooves are formed in the tire, being inclined with respect to reference lines parallel with the rotating axis of the tire, in a predetermined range. CONSTITUTION:Shoulder grooves 2M in the outer half of a tread section which is positioned outside of a vehicle, are inclined at an angle theta1 of 10-35 deg. with respect to a reference line A which is extended from the end TM of the tread, in parallel with the rotating axis of the tire while center transverse grooves 3M are inclined at an angle theta2 of -10--35 deg. with respect to a reference line B which is extended from a longitudinal groove G2, in parallel with the rotating axis of the tier. With this arrangement the discharge of air is made smooth and it is possible to reduce air pumping sound and impacting sound so that the tire may have low noise. |
