RUNFLAT TIRE Russian patent published in 2021 - IPC B60C9/22 B60C17/00 B60C11/12 B60C11/00 

FIELD: automobile industry.

SUBSTANCE: invention relates to the automobile industry. To increase resistance to impact shocks without compromising performance on ice, the runflat tire includes: a set of slots (60) formed in the blocks (20); a reinforcing layer (40) of the breaker, located on the outer side of the layer (14) of the breaker in the radial direction of the tire; and the side reinforcing rubber element (50) located on the sections (8) of the sidewall, with the density of the slots (60) formed in the central block (21) in the range from 0.10 cord/mm or more to 0.30 cord/mm or less, the reinforcing layer (40) of the breaker includes a central reinforcing section (41) on which more central reinforcing sections (41) are stacked on top of each other in the area of the central Ac zone than at points other than the central Ac zone, The width Wc of the central reinforcing section (41) of the reinforcing layer (40) of the breaker is in the range of 0.5 Gr ≤ Wc ≤ 2.5 Gr with respect to the thickness Gr of the side reinforcing rubber element (50) at the point P of the maximum tire width, and the average width Wc of the central reinforcing section (41) is in the range of 50% or more to 90% or less of the width WL of the central block (21).

EFFECT: increased shock resistance without deterioration in performance when driving on ice.

6 cl, 12 dwg