An aircraft landing gear assembly (10, 30) comprising: an elongate bogie beam (12, 32) including a bearing via which the bogie beam is arranged to be movably mounted to an aircraft landing gear main strut, first and second end regions, a first longitudinal axis extending between the bearing and the first end region and a second longitudinal axis extending between the bearing and the second end region; a first axle mounted at a first end region of the bogie beam, the first axle defining a first wheel mounting portion on a first side of the bogie beam for supporting a first wheel assembly and a second wheel mounting portion on a second side of the bogie beam for supporting a second wheel assembly; a second axle mounted at a second end region of the bogie beam, with the bearing between the first and second end regions, the second axle defining a third wheel mounting portion on the first side of the bogie beam for supporting a third wheel assembly and a fourth wheel mounting portion on the second side of the bogie beam for supporting a fourth wheel assembly, wherein the bogie beam is arranged to enable the first and second axles to each pivot relative to the bearing about the respective longitudinal axis of the bogie beam by an amount which is sufficient to place a wheel rim of a wheel assembly in contact with the ground in the event of a tyre of the wheel assembly deflating, characterised in that: the bogie beam is arranged to enable the first and second axles to each pivot relative to the bearing about the longitudinal axis of the bogie beam by virtue of first and second flexure zones (FZ1, FZ2) of the bogie beam, the first flexure zone being located between the bearing and the first axle and the second flexure zone being located between the bearing and the second axle. an elongate bogie beam (12, 32) including a bearing via which the bogie beam is arranged to be movably mounted to an aircraft landing gear main strut, first and second end regions, a first longitudinal axis extending between the bearing and the first end region and a second longitudinal axis extending between the bearing and the second end region; a first axle mounted at a first end region of the bogie beam, the first axle defining a first wheel mounting portion on a first side of the bogie beam for supporting a first wheel assembly and a second wheel mounting portion on a second side of the bogie beam for supporting a second wheel assembly; a second axle mounted at a second end region of the bogie beam, with the bearing between the first and second end regions, the second axle defining a third wheel mounting portion on the first side of the bogie beam for supporting a third wheel assembly and a fourth wheel mounting portion on the second side of the bogie beam for supporting a fourth wheel assembly, wherein the bogie beam is arranged to enable the first and second axles to each pivot relative to the bearing about the respective longitudinal axis of the bogie beam by an amount which is sufficient to place a wheel rim of a wheel assembly in contact with the ground in the event of a tyre of the wheel assembly deflating, characterised in that: the bogie beam is arranged to enable the first and second axles to each pivot relative to the bearing about the longitudinal axis of the bogie beam by virtue of first and second flexure zones (FZ1, FZ2) of the bogie beam, the first flexure zone being located between the bearing and the first axle and the second flexure zone being located between the bearing and the second axle.