Patent ID: 9505273
Filing Date: 2016-11-29
CPC Classification: B60C

Claim Text:
1. A tire adapted to run along ground which may be covered with ice, comprising: a tread comprising a first part in contact with the ground and at least one second part placed radially to the inside of the first part, the first part of the tread being formed from a first rubber composition and the second part of the tread being formed from a second rubber composition different from the first rubber composition; and at least one stud comprising: wherein at least one stud is placed in the tread so that: wherein at least one second part of the tread surrounds the head of said at least one stud and extends: wherein a skin may optionally be formed from the first rubber composition and placed between said at least one stud and said at least one second part of the tread, wherein the thickness of any skin ( wherein the complex modulus G*(0° C.) of the first rubber composition is less than 1.5 MPa; and wherein the complex modulus G* of the second rubber composition varies with temperature such that G*(5° C.) is equal to or greater than 5 MPa and G*(20° C.) is less than or equal to 0.5 G*(5° C.).