Tire

A tire, comprising:

• a pair of bead cores;
• a carcass layer extended across the bead cores;
• a belt layer disposed on an outer side of the carcass layer in a radial direction;
• and
• a tread portion;
• a tire outer diameter OD (mm) being in a range 200≤OD≤660,
• a total tire width SW (mm) being in a range 100≤SW≤400,
• a groove area ratio Aa (%) of the tread portion being in a range 0.008≤Aa/OD≤0.150, and
• when a region of 48×(OD/SW){circumflex over ( )}(1/5) (%) from a maximum ground contact width end portion on a tire inner side when the tire is mounted on a vehicle is defined as a tire inner region of the tread portion, a groove area ratio Ai (%) of the tire inner region and a groove area ratio Ao (%) of a tire outer region as a region other than the tire inner region have a relationship Ai<Ao;
• wherein
• a groove area ratio Ai30 in a region from a ground contact edge on a tire inner side of the tread portion to 30% of a ground contact width is in a range 0≤Ai30≤40,
• a groove area ratio Ao30 in a region from a ground contact edge on a tire outer side of the tread portion to 30% of a ground contact width is in a range 5≤Ao30≤50,
• a ratio Ai30/Ao30 of the groove area ratio Ai30 to the groove area ratio Ao30 is in a range 0.1≤Ai30/Ao30≤1,
• a maximum groove depth Gmax (mm) of the entire tread portion satisfies 0.006≤Gmax/OD≤0.083,
• a ratio Ai/Ao of the groove area ratio Ai to the groove area ratio Ao satisfies 0.05×(OD/650)<Ai/Ao<1,
• a ratio Gi/Go of a maximum groove depth Gi (mm) of the tire inner region to a maximum groove depth Go (mm) of the tire outer region satisfies 0.4≤Gi/Go≤1.6,
• the tread portion has a circumferential main groove extending in a tire circumferential direction,
• the circumferential main groove has a groove width of 3 mm or more,
• a projected area C (mm2) of the circumferential main groove satisfies 0.03≤C/(SW×OD)≤1.01, and
• an average pitch number Po (piece) (Po is a natural number) within a tire ground contact length in the tire outer region satisfies OD/200≤Po≤OD/50 with respect to the tire outer diameter OD.