Heavy duty pneumatic radial tires

摘要

A heavy duty pneumatic radial tire (1) comprises a tread portion (2), a pair of sidewall portions (4), a pair of bead portions containing a pair of bead cores (3) therein, at least one radial carcass ply (5), and a bead filler comprised of at least two rubber stocks, in which at least a part of an outer surface of a turnup portion (6) of the carcass ply (5) in axial direction of the tire is covered with a deformation-absorbing rubber layer arranged along an upper rubber stock of the bead filler and having a Shore A hardness of not more than 55 DEG .