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 (t1) 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 (t2) 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 (t1) 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 (t2) 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. <EOS>