Tire having tread grooves having right-hand groove wall and left-hand groove wall

A tire comprising

• a tread portion in which a mold parting line by a single-split mold runs on or near the tire equator defining a right-hand part of the tread portion on one side of the mold parting line and a left-hand part on the other side,
• the tread portion provided in at least a central part with tread grooves each having a right-hand groove wall and a left-hand groove wall, wherein
• in the right-hand part,
• the right-hand groove walls are at least partially provided with an inclined part extending from the tread face towards the groove bottom while inclining to the left,
• and the left-hand groove walls are inclined less than the inclined part of the respective opposite right-hand groove walls,
• in the left-hand part,
• the left-hand groove walls are at least partially provided with an inclined part extending from the tread face towards the groove bottom while inclining to the right,
• and the right-hand groove walls are inclined less than the inclined part of the respective opposite left-hand groove walls,
• the inclined parts are
• a first inclined part extending from the tread face to the vicinity of the groove bottom, inclining at a first inclination angle of from 15 to 45 degrees with respect to the normal direction to the tread face, and/or
• a second inclined part inclined at a second inclination angle of from 30 to 60 degrees with respect to the normal direction to the tread face and having a width of from 0.3 to 2 mm when measured in parallel to the tread face and accompanied by a recess which is narrower and shallower than the tread groove and extends along the second inclined part, and
• the tread grooves include a circumferential groove provided with the second inclined part accompanied by a recess, wide oblique grooves provided with the first inclined part, and narrow oblique grooves provided with the second inclined part accompanied by a recess.