NON-STUDDED SNOW TIRE Russian patent published in 2012 - IPC B60C11/04 B60C11/03 B60C11/11 B60C5/00 

FIELD: transport.

SUBSTANCE: invention relates to automotive tire to be used for travelling over ice and snow. Running surface (10) of non-studded snow tire is positioned so that side grooves (3A, 3B, 3C, 3D, 5) running in axial direction in each of grain blocks (2A, 2B, 2C, 2D) the axial length of side grooves (3A, 3B, 3C, 3D) disclosing in at least one of straight longitudinal grooves (1, 1A, 1B) running adjacent to grain block where side groove is contained is called groove edge element. Ratio of total length of groove edge elements on inner running surface IN to total length of groove edge elements on outer running surface OUT is equal to 1.03-1.3. Ratio of negative outer running surface coefficient OUT to negative inner running surface coefficient IN is equal to 0.85-1.0.

EFFECT: higher grip, as well as driving stability during travelling over ice and snow.

2 cl, 1 dwg