surface 20 for example has a substantially triangular shape having an axial width decreasing gradually from the ground contact surface toward the bottom 32 d in this embodiment the recess bottom surface 20 is a spherical triangle surface that protrudes radially outwardly such a recess bottom surface 20 may generate a large snow shearing force by introducing snow into the second recess 32 effectively when traveling on snowy road the recess bottom surface 20 includes a first side 21 extending on the sidewall 8 of the second land portion 12 a second side 22 which is a boundary to the ground contact surface 25 of the second land portion 12 and a third side 23 located between the first side 21 and the second side 22 the length of the first side 21 for example is preferably longer than those of the second side 22 and the third side 23 such a second recess 32 with the crown main groove 4 may form a large snow column to improve on snow performance the angle u03b8 7 between the first side 21 and the third side 23 is preferably in a range of not less than 10 degrees more preferably not less than 15 degrees but preferably not more than 30 degrees more preferably not more than 25 degrees when the angle u03b8 7 is less than 10 degrees a sufficient volume of the second recess 32 may not.