TYRE TREAD FOR FARM VEHICLE Russian patent published in 2018 - IPC B60C11/00 

FIELD: agriculture; machine building.

SUBSTANCE: invention relates to a tyre for a farm vehicle. Tread (2) has lugs (3) separated from each other by grooves (4), with each lug (3) extending radially outwards over a radial height H from bottom surface (5) to contact face (6). First lug portion (31), made of a first elastomer mixture, extends radially inwards from contact surface (6) to first interface (7), over radial distance D₁ equal to at least 0.5 times of radial height H of the lug and no more than one radial height H of the lug. Second lug portion (32), made of a second elastomer mixture, extends radially inwards from first interface (7) to bottom surface (5) over radial distance D₂. Second elastomer mixture extends radially inside lugs (3) and grooves (4) from bottom surface (5) to second interface (8) over a radial distance D₃, wherein radial distance D₃ between bottom surface (5) and second interface (8) is at least 3 mm and does not exceed 15 mm.

EFFECT: increased resistance to tread wear and aggressive action on it.

5 cl, 3 dwg