Heavy duty pneumatic tire

摘要

Provided is a pneumatic tire in which heat generation in lands in a tread center region is reduced. The tread pattern of a pneumatic tire has center lug grooves (14) provided at a distance from each other in the circumferential direction of the tire and extending across the equatorial line of the tire; shoulder lug grooves (12A, 12B) extending outward in the width direction of the tire at positions corresponding to the gaps provided between the center lug grooves in the circumferential direction of the tire, the inner ends of the shoulder lug grooves (12A, 12B) in the width direction of the tire being located outside the ends of the center lug grooves in the width direction of the tire; a pair of circumferential primary grooves (11A, 11B) each formed in a wavy shape along the entire circumference of the tire by connecting ends of the center lug grooves and the inner ends of shoulder lug grooves in the width direction of the tire; and a circumferential secondary groove (10) formed along the equatorial line of the tire and extending over the entire circumference of the tire and intersecting the center lug grooves. The angle of tilt of the straight line connecting the portion where a center lug groove and the circumferential secondary groove intersect and an end of the center lug groove, relative to the circumferential direction of the tire is in the range of 55º to 75º, inclusive.