HEAVY-DUTY PNEUMATIC TIRE AND MANUFACTURING METHOD THEREOF

A tire 2 includes a tread 4 on which at least three circumferential grooves 24 continuously extending in a circumferential direction are formed, and a belt 14 located radially inward of the tread 4. A ratio of a center stretch, at a center portion of the belt, indicated by the following formula (2) to a shoulder stretch, at an end portion of the belt, indicated by the following formula (1) is not less than 1 and not greater than 3, and the shoulder stretch is not less than 1%. (Shoulder stretch) 100 × Rsa − Rsb / Rsb (Center stretch) 100 × Rca − Rcb / Rcb