TIRE Russian patent published in 2023 - IPC B60C11/16 

FIELD: motor transport.

SUBSTANCE: invention relates to winter studded tires. The tire includes tread 2. The tread 2 includes a recess 7 which extends from the ground contact surface 2s of the tread. The recess 7 includes a bottom surface 8 and an inner circumferential surface 9 which is connected to the bottom surface 8 and the ground contact surface 2s. The recess 7 is provided with a stud fixing hole 5, which is open on the bottom surface 8, and protrusions extending from the bottom surface 8. The protrusions 10 include a first protrusion 11 which is connected to the ground contact surface 2s and extends outward in the tire radial direction from the ground contact surface 2s.

EFFECT: improved performance on icy road surfaces.

8 cl, 7 dwg, 1 tbl