TIRE

The tire 1 comprises a tread portion 2 provided with a first circumferential groove 10 and a second circumferential groove 20 each extending in the tire circumferential direction, and lateral grooves 40 connecting between the first circumferential groove 10 and the second circumferential groove 20. The first circumferential groove 10 extends zigzag and comprises a radially outer first portion 11 having the smallest width and a radially inner second portion 12 having a width larger than that of the first portion 11.