发明授权
US07958921B2 Pneumatic tire with tread having sub grooves in blocks, center main groove and subsidiary main grooves 有权
具有胎面的气动轮胎具有块的子槽,中心主槽和辅助主槽

Pneumatic tire with tread having sub grooves in blocks, center main groove and subsidiary main grooves
摘要:
A pneumatic tire having a designated rotational direction is disclosed, wherein an entire area having a width 85% of a total tire width and a center area having a width 30% of the total tire width are defined in a tread portion. A center main groove is positioned on a tire equatorial line and extends in a tire circumferential direction. Subsidiary main grooves are positioned on two sides of the center main groove and extend in the tire circumferential direction. Angled and lateral grooves extend at an angle, in a direction opposite the rotational direction towards an outside in the tire width direction. Lateral grooves extend from each subsidiary main groove. Sub grooves extend from the lateral grooves towards the rotational direction. A total length of a block edge in the center area is from 40% to 60% of a total length of a block edge in the entire area.
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