Tire

A tire comprising a tread part that is formed of a rubber composition, wherein

• the rubber composition comprises a rubber component comprising an isoprene-based rubber in an amount of 75% to 90% by mass and a styrene-butadiene rubber in an amount of 10% to 25% by mass,
• the styrene-butadiene rubber has a vinyl content that is greater than 26 mol % and not more than 45 mol %,
• the styrene-butadiene rubber has a styrene content of 5% by mass or more and 18% by mass or less,
• the rubber composition has a ratio A of ash content defined by the following formula that is greater than 25%,
• the tread part comprises
• two or more circumferential main grooves extending in a tire circumferential direction, and
• land parts partitioned by the circumferential main grooves,
• at least one land part of the land parts comprises at least one flask-like circumferential groove extending in the tire circumferential direction,
• the flask-like circumferential groove comprises
• a neck part having a narrow groove width, and
• a trunk part arranged on an inner side in a tire radial direction with respect to the neck part and having a part with a groove width greater than a maximum groove width of the neck part:
• A=(m2/m1)×100
• wherein m1 denotes a mass of a residue obtained by soaking a specimen of the rubber composition in acetone for 72 hours to extract a soluble component in accordance with JIS K 6229 and heating the specimen after the extraction from room temperature to 750° C. in nitrogen in accordance with JIS K 6226-1:2003 to pyrolyze and vaporize an organic substance, and
• m2 denotes a mass of a residue after oxidation and combustion by heating, in air in accordance with JIS K 6226-1:2003, the residue after the pyrolysis and the vaporization (mass:
• m1).