A tire with a tread portion comprising one or more tread blocks and/or one or more tread ribs, and having a plurality of sipes (15, 17, 19, 37, 39) formed in one or more of the tread blocks and/or in one or more of the tread ribs, each sipe (15, 17, 19, 37, 39) being open at the radially outer surface of a tread block or tread rib; wherein the tire has at least one sipe pattern comprising, in the circumferential direction of the tire, one or more straight sipes extending in the radial direction of the tire and two or more inclined sipes (17, 19, 37, 39); wherein at least one straight sipe is arranged between two inclined sipes (17, 19, 37, 39); wherein the inclined sipes (17, 19, 37, 39) have a main sipe direction that is inclined by an angle (a) relative to the radial direction, the main sipe direction of an inclined sipe (17, 19, 37, 39) being the line linking the open end of the sipe (17, 19, 37, 39) at the radially outer surface of a tread block or tread rib and an innermost end of the sipe (17, 19, 37, 39) in the tire radial direction; wherein one or more inclined sipes (17, 19, 37, 39) are positively inclined sipes and one or more inclined sipes (17, 19, 37, 39) are negatively inclined sipes, the one or more positively inclined sipes being inclined in a direction opposite, relative to the tire radial direction, to the one or more negatively inclined sipes; characterized in that one or more inclined sipes (17, 19, 37, 39) comprise at least one fold dividing the inclined sipe (17, 19, 37, 39) in two or more sub-portions (21, 23, 29, 31) being successive along the length of the sipe (17, 19, 37, 39), the length of a sipe (17, 19, 37, 39) being the distance from its open end to its innermost end; and in that at least two inclined sipes (17, 19, 37, 39) extend to different depths, wherein the one or more inclined sipes (17, 19, 37, 39) being the deepest sipes are long inclined sipes and have a defined depth and at least one inclined sipe (17, 19, 37, 39) is a short inclined sipe having a depth that is ranging from 30 to 70 % of the depth of the one or more long inclined sipes (17, 19, 37, 39); the depth of a sipe being determined according to the radial direction of the tire. wherein the tire has at least one sipe pattern comprising, in the circumferential direction of the tire, one or more straight sipes extending in the radial direction of the tire and two or more inclined sipes (17, 19, 37, 39); wherein at least one straight sipe is arranged between two inclined sipes (17, 19, 37, 39); wherein the inclined sipes (17, 19, 37, 39) have a main sipe direction that is inclined by an angle (a) relative to the radial direction, the main sipe direction of an inclined sipe (17, 19, 37, 39) being the line linking the open end of the sipe (17, 19, 37, 39) at the radially outer surface of a tread block or tread rib and an innermost end of the sipe (17, 19, 37, 39) in the tire radial direction; wherein one or more inclined sipes (17, 19, 37, 39) are positively inclined sipes and one or more inclined sipes (17, 19, 37, 39) are negatively inclined sipes, the one or more positively inclined sipes being inclined in a direction opposite, relative to the tire radial direction, to the one or more negatively inclined sipes; characterized in that one or more inclined sipes (17, 19, 37, 39) comprise at least one fold dividing the inclined sipe (17, 19, 37, 39) in two or more sub-portions (21, 23, 29, 31) being successive along the length of the sipe (17, 19, 37, 39), the length of a sipe (17, 19, 37, 39) being the distance from its open end to its innermost end; and in that at least two inclined sipes (17, 19, 37, 39) extend to different depths, wherein the one or more inclined sipes (17, 19, 37, 39) being the deepest sipes are long inclined sipes and have a defined depth and at least one inclined sipe (17, 19, 37, 39) is a short inclined sipe having a depth that is ranging from 30 to 70 % of the depth of the one or more long inclined sipes (17, 19, 37, 39); the depth of a sipe being determined according to the radial direction of the tire.