| 摘要 |
An asymmetrical tread for a tire has a midcircumferential plane and an inner side and an outer side when mounted on a vehicle wheel. The longitudinally extending ribs in a central segment have substantially equal surface contact areas and their contact surface ratios sequentially decrease when taken from the outer side to the inner side of the tread. Two lateral ribs have equal surface contact areas with the first lateral rib at the innermost lateral segment having a contact surface ratio less than the second lateral rib at the outermost later segment of the tread. The tread rubber volume is equal on the two sides of the midcircumferential plane of the tread. The improvements in performance compared to other asymmetrical tire treads is realized in maintaining good straight ahead driving features for the tread of this invention. Improvements in tire performance for vehicle turn maneuvers and for unsymmetrical vehicle wheel camber are realized. In particular, improved tread wear, snow traction, tire noise, lateral traction and overall vehicle handling has been achieved.
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