Heavy-duty pneumatic tire

A heavy-duty pneumatic tire comprising:

• a section width being equal to or less than 335 mm;
• an aspect ratio being equal to or less than 55%;
• a toroidal carcass extending between axially spaced bead portions through a tread portion and sidewall portions, wherein the carcass comprises a carcass ply comprising a main portion extending between bead cores each disposed in a respective one of the bead portions through the tread portion and the sidewall portions, and a turn-up portion turned up around each bead core of each bead portion from axially inside of the tire to outside of the tire and extending to a radially outer end thereof;
• a belt layer disposed radially outward of the carcass in the tread portion, wherein the radially outer end of the turn-up portion is located between the main portion and the belt layer in the tread portion, wherein
• the belt layer comprises first, second, third and fourth belt plies superimposed in this order from radially inside of the tire,
• the second belt ply comprises an axially outer edge that is located axially outwardly of an axially outer edge of the first belt ply, in a tire half cross-section with respect to a tire equator;
• a sidewall rubber defining an outer sidewall profile of each sidewall portion, the sidewall rubber having complex modulus E*4 of from 3.0 to 5.5 MPa;
• and
• a chafer rubber defining an outer bead profile of each bead portion, wherein in each bead portion, on a straight line that is perpendicular to the main portion of the carcass ply and passes a radially inner end of the sidewall rubber, the chafer rubber has a thickness of from 40% to 60% of a thickness of the bead portion, wherein
• in the tire half cross-section, the radially outer end of the turn-up portion of the carcass ply, in the tire axial direction, is located between the axially outer edges of the first belt ply and the second belt ply.