Motorcycle tire for running on rough terrain

A tread for a motorcycle tire, wherein

• the tread includes a tire equator, a first tread end, and a plurality of first blocks on a first tread end side with respect to the tire equator, and, in a plan view of the tread, a crown region extending in a tire circumferential direction and overlapping the tire equator, a middle region extending in the tire circumferential direction and being adjacent to the crown region on the first tread end side, a shoulder region extending in the tire circumferential direction and being adjacent to the middle region and extending in a tire axial direction from the middle region to the first tread end, and no portion of any of the first blocks is in the crown region,
• each of the plurality of first blocks includes:
• a tread surface facing outward in a tire radial direction, and
• an outer side wall on the first tread end side,
• the tread surface of each of the first blocks includes an outer edge between the tread surface and the outer side wall,
• the outer edge of the tread surface includes:
• a protrusion protruding locally on the first tread end side,
• a first portion on a first side in the tire circumferential direction of the protrusion, and
• a second portion on a second side in the tire circumferential direction of the protrusion opposite the first side, and
• in the plan view of the tread the first portion and the second portion of the outer edge of the tread surface are disposed so as to form a minor angle therebetween on the first tread end side as measured axially outward from the outer edges of the first and second portions, away from the first block, the minor angle being from 140 degrees to 160 degrees,
• a narrow groove, a first lateral groove, and a second lateral groove extend into each of the first blocks in the tire radial direction,
• the narrow groove, the first lateral groove, and the second lateral groove collectively surround a portion of a protruding block piece integral with the protrusion,
• the protruding block piece includes:
• a constant width portion that extends toward the tire equator, and
• a widening portion in which a width thereof in the tire circumferential direction increases toward a tire equator side,
• in the plan view of the tread, a width of the constant width portion is less than a maximum width of the widening portion,
• in the plan view of the tread, no portion of the widening portion of the protruding block piece extends from the first and second lateral grooves,
• a maximum groove width of the narrow groove is 70% to 90% of a maximum length in the tire circumferential direction of a protruding side wall forming the protrusion,
• in a side view of the each of the first blocks, the protrusion protrudes outward in a block width direction more than each of the first portion and the second portion,
• for each of the first blocks the widening portion of the protruding block piece is closer to the tire equator compared to the constant width portion of the protruding block piece,
• in the plan view of the tread, the outer side wall for each of the first blocks faces toward the first tread end,
• in the plan view of the tread, at least some of the first blocks extend into both the shoulder region and the middle region,
• in the plan view of the tread, some but not all of the first blocks directly face in the tire axial direction toward the first tread end,
• the first block includes a protruding block piece forming the protrusion and the first and second portions of the outer edge of the tread surface,
• each of the first blocks, in the plan view of the tread, define a first pair of edges separated by the protrusion of the outer edge of the tread surface, and a second pair of edges opposite the first pair of edges, and
• in the plan view of the tread portion, the edges of the first pair face inward toward a longitudinal axis that extends lengthwise through the protruding block piece to define the minor angle between the edges of the first pair.