A tire has a tread comprising at least two tread pattern elements (MA, MB) distributed periodically in the circumferential direction at pitches (PA, PB). Each tread pattern element is formed of three portions (Z1, Z2, Z3), each defining a volumetric element of which the leading edge corner is the one common to the tread surface and is the first to enter the contact patch in which the tire is in contact with the ground. With each leading edge corner being chamfered, in the portions Z1 and/or Z2, and/or Z3, the widths of the chamfers of the leading edge corners (LCiA, LCiB, i ranging from 1 to 3) satisfy the following inequalities: a) for the portion Z1:[[]]0.8*PAPB≤LC1ALC1B≤PAPB*1.2;b) for the portion Z2:[[]]0.8*PAPB≤LC2ALC2B≤PAPB*1.2;and c) for the portion Z3:[[]]0.8*PAPB≤LC3ALC3B≤PAPB*1.2.Moreover, the sipes density of each tread pattern element (SDA, SDB) is at least equal to 10 mm−1 and at most equal to 70 mm−1.
TIRE COMPRISING A TREAD OPTIMIZED FOR GRIP ON SNOW-COVERED GROUND
2023-04-20
Patent
Elektronische Ressource
Englisch
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |
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