Pneumatic tire

A pneumatic tire having a tread portion, plural tread grooves including a first tread groove and a second tread groove formed in the tread portion, and a first bottom-up portion with a top surface as a tread wear indicator, the first bottom-up portion being provided at a groove bottom of the first tread groove such that a distance measured in the tire radial direction from an opening end position of the first tread groove to the top surface is x1, comprising:

• a second bottom-up portion with a top surface as a retread indicator, the second bottom-up portion being provided at a groove bottom of the second tread groove formed in the central region of the tread portion such that a distance measured in the tire radial direction from an opening end position of the second tread groove to the top surface is x2 shorter than said x1,
• wherein the first tread groove is a circumferential groove formed in the central region of the tread portion, the second tread groove is a tire widthwise groove formed in the central region of the tread portion, and the second bottom-up portion is provided only in said tire widthwise groove in the central region of the tread portion, and
• the central region of the tread portion represents a region extending across a length corresponding to 50% of the tread width W with the center of the region coinciding with the tire equatorial plane S;
• wherein between 2 to 8 of the second bottom-up portions are provided along a circumference line of the tire at predetermined intervals therebetween.