FIELD: motor car construction.
SUBSTANCE: tire tread surface in contact with the soil has at least one major groove (2a) extending along the tread, or the major groove (2a) and minor groove (2b) that differs from said major groove (2a. It has also the auxiliary groove, its width making ≤2 mm in the area across the tread width while the ratio of the negative area of major groove (2a) varies from 12% to 20%.
EFFECT: better grip on dry and wet surface.
13 cl, 10 dwg, 5 tbl
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|---|---|---|---|
| PNEUMATIC RADIAL TIRE FOR PASSENGER VEHICLE | 2012 |
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