PNEUMATIC TIRE Russian patent published in 2011 - IPC B60C11/04 B60C11/11 B60C11/12 

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Pneumatic tire comprises two first main grooves, multiple lateral grooves and multiple slot-like drain grooves in treat section. Groove wall surface nearby each first main groove located closer to tire equatorial line allows cyclic variation of groove wall inclination relative to direction along normal line to tread. Note here that said variation represents gradual increase from minimum of 0° to 15° to maximum of 15° to 45° At points whereat said inclination exists at the level of its maximum neither lateral groove communicates with main groove. At these points groove wall surface is continuous.

EFFECT: perfected cross-country capacity.

8 cl, 9 dwg, 1 tbl