A motorcycle tire includes a tread portion including a central region and a pair of shoulder regions. In a cross-sectional view of the tire under a standard condition, the central region has an outer profile protruding radially outwardly and having a first radius of curvature R1, and each shoulder region having an outer profile protruding radially outwardly and having a second radius of curvature R2 smaller than the first radius of curvature R1. The tread portion is provided with a zigzag central main groove in the central region with zigzag corners, a plurality of shoulder lateral grooves each extending axially outwardly from each zigzag corner to one of the shoulder regions, and a plurality of shoulder sub groove each disposed between a pair of circumferentially adjacent shoulder lateral grooves and each extending axially outwardly from the central region to the shoulder region.