Patent ID: 8162014

Claim:
Tyre for motor-vehicles provided with a tread pattern wear indicator, where a tread of the tyre is formed by pattern parts in the form of circumferential ribs or in the form of blocks and contains at least one circumferential groove having a bottom surface of a depth (H), the indicator being arranged in a surface part of a circumferential rib or block, which can come into contact with a road surface, and the indicator comprises sipes running radially into the tyre tread, wherein the indicator sipes have a greatest depth that is smaller than the depth (H) of the circumferential groove, characterized in that the indicator ( 3 ) is formed of seven radial sipes of three different depths, created and arranged so that they form the Arabic numeral 8 in segment depiction at the surface of the tread, where one of the above radial sipes has a smallest depth, and in a horizontal section by a plane running through a bottom of the sipe having the smallest depth in parallel with the tread surface the other 6 sipes are arranged into the Arabic numeral 6 in segment depiction, which is visible at a certain degree of tyre wear, and three further sipes of the above seven having the greatest depth are arranged such that a middle sipe of the three further-sipes is oriented substantially perpendicular to the other two sipes of the three sipes so that only part of the Arabic numeral 4 is formed, which is formed in a bottom plane of the three remaining sipes having a middle depth.