Heavy duty pneumatic tires including protrusions

A heavy duty pneumatic tire comprising;

• a tread provided with plural circumferential grooves extending in a circumferential direction of the tire, land portions defined by these circumferential grooves, and a groove fence portion formed in a circumferential groove so as to extend in a direction blocking the circumferential groove, in which the groove fence portion comprises at least two protrusions extending from a groove wall and/or groove bottom of the circumferential groove, and a space between the protrusions under a normal internal pressure in a widthwise direction of the tire is 0.5-2.0 mm, and a space between the protrusions under a load in the circumferential direction is 0.4-3.0 mm so as not to contact these protrusions with each other.