A tire comprising: a tread portion comprising a shoulder land region including a tread edge (Te) and provided with shoulder lateral grooves and circumferential sipes connecting between the shoulder lateral grooves, wherein a sipe has a width being not more than 1.5 mm and a groove has a width being more than 1.5 mm, wherein the shoulder lateral grooves are each provided with a chamfer, the chamfer being formed by an inclined surface extending obliquely from the ground contacting top surface of the shoulder land region to the groove side wall of the shoulder lateral groove, the chamfer comprising a constant width portion extending in the longitudinal direction of the shoulder lateral groove with a constant width, the constant width being measured in the direction orthogonal to the widthwise center line of the shoulder lateral groove, the constant width portion extending from the axially inner end of the shoulder lateral groove beyond the tread edge (Te); the circumferential sipes are each spaced apart from an axially inner end of the shoulder land region by an axial distance (La) of from 30% to 100% of an axial width (Ws) of the shoulder land region, wherein the tread portion is provided with a shoulder main groove extending in the tire circumferential direction and defining said axially inner end of the shoulder land region, and the axial width (Ws) of the shoulder land region is the axial width between the axially inner end of the shoulder land region and the tread edge (Te), characterized in that depths of the circumferential sipes are equal to or greater than groove depths of the shoulder lateral grooves. a tread portion comprising a shoulder land region including a tread edge (Te) and provided with shoulder lateral grooves and circumferential sipes connecting between the shoulder lateral grooves, wherein a sipe has a width being not more than 1.5 mm and a groove has a width being more than 1.5 mm, wherein the shoulder lateral grooves are each provided with a chamfer, the chamfer being formed by an inclined surface extending obliquely from the ground contacting top surface of the shoulder land region to the groove side wall of the shoulder lateral groove, the chamfer comprising a constant width portion extending in the longitudinal direction of the shoulder lateral groove with a constant width, the constant width being measured in the direction orthogonal to the widthwise center line of the shoulder lateral groove, the constant width portion extending from the axially inner end of the shoulder lateral groove beyond the tread edge (Te); the circumferential sipes are each spaced apart from an axially inner end of the shoulder land region by an axial distance (La) of from 30% to 100% of an axial width (Ws) of the shoulder land region, wherein the tread portion is provided with a shoulder main groove extending in the tire circumferential direction and defining said axially inner end of the shoulder land region, and the axial width (Ws) of the shoulder land region is the axial width between the axially inner end of the shoulder land region and the tread edge (Te), characterized in that depths of the circumferential sipes are equal to or greater than groove depths of the shoulder lateral grooves.