A tire comprising a tread part of a rubber composition comprising a rubber component comprising an isoprene-based rubber and a styrene-butadiene rubber, wherein a vinyl content of the styrene-butadiene rubber is greater than 26 mol%, wherein a ratio A of an ash content of the rubber composition that is defined by the following formula is greater than 25 mol%, wherein 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, wherein at least one land part of the land parts comprises at least one flask-like circumferential groove extending in the tire circumferential direction, and wherein 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 = m 2 / m 1 × 100 (wherein m 1 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 m 2 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: m 1 )). wherein a vinyl content of the styrene-butadiene rubber is greater than 26 mol%, wherein a ratio A of an ash content of the rubber composition that is defined by the following formula is greater than 25 mol%, wherein 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, two or more circumferential main grooves extending in a tire circumferential direction, and land parts partitioned by the circumferential main grooves, wherein at least one land part of the land parts comprises at least one flask-like circumferential groove extending in the tire circumferential direction, and wherein 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 = m 2 / m 1 × 100 (wherein m 1 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 m 2 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: m 1 )). 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 = m 2 / m 1 × 100 <EOS>