Patent ID: 10471775

Abstract:
An asymmetric tread for a snow tire comprising a rubber composition, comprising a tread surface intended to be in contact with the ground when the tire is running, and comprising a sequence of basic patterns arranged in the circumferential direction, each extending over at least 80% of the width (W) of the tread, each comprising a plurality of raised elements provided with sipes opening onto the tread surface, each sipe having a width of less than 1 mm and a depth of at least 3 mm. For each basic pattern, a sipes orientation level (NO) is defined that corresponds to 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, Wm is the width of the basic pattern and αi is the positive or negative angle formed on the tread surface by the ith sipe with the transverse direction, where |αi|≤45 degrees, said orientation level being greater than or equal to 1.5 degrees/mm. The rubber composition comprises at least one diene elastomer, a reinforcing inorganic filler, and a plasticizing system comprising a liquid plasticizing agent being a vegetable oil in a content B of between 10 and 60 phr.