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

FIELD: transport.

SUBSTANCE: invention relates to air tire. Tire tread is provided with blocks 26 separated by peripheral and crosswise grooves. Said block 26 has cutout 28, its wall surface being furnished with fine structure 32 with height varying from 1/50 of cutout width (t) to at least 1/10 of cutout width (t). This allows reducing water friction relative to cutout wall surface compared with traditional tires. So, water existing on ice comes in contact with cutout wall surface to be readily sucked into said cutout.

EFFECT: improved braking characteristics on ice.

12 cl, 27 dwg