LUFTREIFEN FÜR MOTORFAHRZEUG, INSBESONDERE FÜR LKW UND DERGLEICHEN

摘要

A description is given of a vehicle wheel tyre having a tread pattern comprising four, that is two lateral and two central circumferential grooves and a plurality of transverse grooves that define at least five circumferential rows of blocks, that is two shoulder rows, two intermediate rows and a central row. All the longitudinal sides of the blocks between the shoulders are parallel to each other and inclined in the same direction with a predetermined angle " alpha " to the equatorial plane of the tyre and the blocks of one row are circumferentially staggered with respect to the blocks of the next row. The ratio of the width, measured axially, of each central circumferential groove to the width, measured axially, of the blocks of the central row is not less than 20 % and the ratio of the width of the lateral circumferential groove to the width of the central circumferential groove is between 50 % and 60 %. The tread pattern includes means of stiffening the blocks of the central row consisting in the fact that each of the front and rear sides of each block is formed by a first and a second straight segments separated by an intermediate third connecting segment. The blocks of the shoulder rows and intermediate rows are connected together by elastic means.