TIRE

A tire comprises a tread portion 2 provided with a first block 13 provided with a first sipe 15 which extends zigzag in a cross section orthogonal to the sipe length direction, and extends zigzag in a cross section parallel to the ground contacting top surface of the first block 13. The first sipe 15 is divided into a first portion 16 and a second portion 17 by a tie bar 18. The sipe bottom 16d in the first portion 16 communicates with a first wide portion 21. The sipe bottom 17d in the second portion 17 communicates with a second wide portion 22. The first wide portion 21 comprises an outer portion 31 and an inner portion 32. The outer portion 31 is formed by a pair of first arcuate groove wall portions 31a. The inner portion 32 is formed by a pair of second arcuate groove wall portions 32a. The first wide portion 21 and the second wide portion 22 do not communicate with each other.