| 摘要 |
<p>The invention relates to an asymmetric tread for a tire comprising a plurality of basic patterns, for each of which there is defined a sipes density corresponding to∑i li P * Wm where i is the number of sipes in the pattern, li is the length of the ith sipe on the tread surface, P is the pitch of the basic pattern and Wm is the width of the basic pattern, a sipes orientation level corresponding to∑i li * alpha i P * Wm , where alphai is the positive or negative angle formed on the tread surface by the ith sipe with the transverse direction and @45 degrees and a steering pull criterion for the basic pattern corresponding to ∑i li * alpha i∑i li * alpha i . The sipes density is greater than or equal to 60 mum/mm2, the sipes orientation level is greater than or equal to 1.5 degrees/mm and the steering pull criterion for the pattern is less than or equal to 0.2. The tread comprises an inboard half-tread adjacent to an inboard sidewall of the tyre, the sipes orientation level relating to the inboard half-tread being greater than 2 degrees/mm.</p> |
