A pneumatic tyre comprising: a pair of bead portion; a pair of bead cores each disposed in a respective one of the pair of bead portions; a carcass extending between the pair of bead cores; and a pair of bead apex rubbers each disposed in a respective one of the pair of bead portions and extending outwardly in a tyre radial direction from a respective one of the pair of bead cores, wherein each bead core comprises a core inner surface extending substantially straight on an inner side in the tyre radial direction of the bead core, in a pre-assemble state where the tyre is not mounted onto a rim and a width in a tyre axial direction of the pair of bead portions is maintained at a rim width, each core inner surface has an angle of 20 degrees plus/minus 2 degrees with respect to the tyre axial direction, and is inclined outwardly in the tyre radial direction toward an outer side in the tyre axial direction, in a tyre cross-sectional view of each of the pair of bead portions, the bead apex rubber comprises a first rubber portion arranged so as to cover a circumference of the bead core and having a circular or substantially elliptical outline, and a second rubber portion tapering outwardly in the tyre radial direction from the first rubber portion, and the first rubber portion is greater in rubber hardness (ha, hb) than the second rubber portion, characterized in that in each of the pair of bead portions, the first rubber portion has a thickness in the tyre axial direction at a location of an innermost end in the tyre axial direction of the bead core being in a range of from 1.0 to 2.0 mm, and wherein in each of the pair of bead portions, the first rubber portion has a thickness in the tyre radial direction at a location of an innermost end in the tyre radial direction of the bead core being in a range of from 1.0 to 2.0 mm. a pair of bead portion; a pair of bead cores each disposed in a respective one of the pair of bead portions; a carcass extending between the pair of bead cores; and a pair of bead apex rubbers each disposed in a respective one of the pair of bead portions and extending outwardly in a tyre radial direction from a respective one of the pair of bead cores, wherein each bead core comprises a core inner surface extending substantially straight on an inner side in the tyre radial direction of the bead core, in a pre-assemble state where the tyre is not mounted onto a rim and a width in a tyre axial direction of the pair of bead portions is maintained at a rim width, each core inner surface has an angle of 20 degrees plus/minus 2 degrees with respect to the tyre axial direction, and is inclined outwardly in the tyre radial direction toward an outer side in the tyre axial direction, in a tyre cross-sectional view of each of the pair of bead portions, the bead apex rubber comprises a first rubber portion arranged so as to cover a circumference of the bead core and having a circular or substantially elliptical outline, and a second rubber portion tapering outwardly in the tyre radial direction from the first rubber portion, and the first rubber portion is greater in rubber hardness (ha, hb) than the second rubber portion, in each of the pair of bead portions, the first rubber portion has a thickness in the tyre axial direction at a location of an innermost end in the tyre axial direction of the bead core being in a range of from 1.0 to 2.0 mm, and wherein in each of the pair of bead portions, the first rubber portion has a thickness in the tyre radial direction at a location of an innermost end in the tyre radial direction of the bead core being in a range of from 1.0 to 2.0 mm.