Heavy duty tire

A heavy duty tire comprising a pair of beads, a carcass extending between the pair of beads, a tread positioned radially outside the carcass and having a tread surface configured to come into contact with a road surface, and a reinforcing layer positioned radially between the carcass and the tread, wherein

• the reinforcing layer includes a belt including a large number of belt cords arranged parallelly, and a band including a band cord spirally wound,
• the belt includes an inner belt ply and an outer belt ply aligned radially,
• an inclination direction of the belt cords included in the inner belt ply is opposite to an inclination direction of the belt cords included in the outer belt ply,
• the band includes a full band obtained by spirally winding a full band strip,
• the full band is positioned between the inner belt ply and the outer belt ply,
• the full band strip includes a cord array in which a plurality of the band cords are arranged,
• the band cords included in the full band strip are not less than two and not greater than five in number,
• a ratio of an axial width of the full band to a width of the tread surface is not less than 0.70 and not greater than 0.80, and
• in the full band strip, the band cords are adjacent to each other at an interval not less than 0.5 mm and not greater than 2.0 mm.