A bearing device (100, 100a, 100b) for supporting a shaft (30, 34) to rotate relative to an outer hub, the bearing device (100, 100a, 100b) comprising: an annular outer race mountable within an interior bore of the hub, the outer race comprising an inwardly facing radial groove sized to receive rounded bearing elements; and an annular inner race mountable to an outwardly curved exterior surface of the shaft (30, 34), the inner race comprising: an outwardly facing radial groove sized to receive the bearing elements, the respective radial grooves (114, 124) of the inner and outer races (102, 104) together forming an annular raceway to retain the bearing elements between the races (102, 104) during use, and an axially convex surface along an innermost diameter of the inner race, the convex surface shaped to directly engage the exterior surface of the shaft (30, 34) when mounted thereto, such that the inner race remains in contact with the shaft (30, 34) while simultaneously accommodating radial deflection of the shaft (30, 34) caused by external forces (F P), characterized in that each of the outer race and the inner race comprises a raised radial shoulder (116, 126) adjacent the respective radial grooves (114, 124), and the height (H s) of the shoulder of the inner race is greater than the height (H s) of the shoulder of the outer race. an annular outer race mountable within an interior bore of the hub, the outer race comprising an inwardly facing radial groove sized to receive rounded bearing elements; and an annular inner race mountable to an outwardly curved exterior surface of the shaft (30, 34), the inner race comprising: an outwardly facing radial groove sized to receive the bearing elements, the respective radial grooves (114, 124) of the inner and outer races (102, 104) together forming an annular raceway to retain the bearing elements between the races (102, 104) during use, and an axially convex surface along an innermost diameter of the inner race, the convex surface shaped to directly engage the exterior surface of the shaft (30, 34) when mounted thereto, such that the inner race remains in contact with the shaft (30, 34) while simultaneously accommodating radial deflection of the shaft (30, 34) caused by external forces (F P), characterized in that an outwardly facing radial groove sized to receive the bearing elements, the respective radial grooves (114, 124) of the inner and outer races (102, 104) together forming an annular raceway to retain the bearing elements between the races (102, 104) during use, and an axially convex surface along an innermost diameter of the inner race, the convex surface shaped to directly engage the exterior surface of the shaft (30, 34) when mounted thereto, such that the inner race remains in contact with the shaft (30, 34) while simultaneously accommodating radial deflection of the shaft (30, 34) caused by external forces (F P), characterized in that each of the outer race and the inner race comprises a raised radial shoulder (116, 126) adjacent the respective radial grooves (114, 124), and the height (H s) of the shoulder of the inner race is greater than the height (H s) of the shoulder of the outer race.