Freewheel hub for a bicycle, comprising: a hub axle, a hub sleeve which is mounted rotatably on the hub axle, a driver which is mounted rotatably on the hub axle and can be connected to at least one sprocket arrangement, a freewheel device arranged between the hub sleeve and the driver, comprising: a first clutch ring, which is coupled or couplable to the hub sleeve in a torque-transmitting manner, a second clutch ring, which is coupled or couplable to the driver in a torque-transmitting manner, wherein the two clutch rings (24, 26) have mutually facing axial toothings (24z, 26z), a preload device which is designed and arranged to preload the two clutch rings (24, 26) axially towards one another, wherein the preload device has a spring arrangement with at least one spring element, and the spring element consists of a plastic with a cellular structure, characterized in that the spring element or each of the spring elements has an arcuate portion, the convex side of which is configured to press against one of the clutch rings (24, 26) in the axial direction, in order to preload the two clutch rings (24, 26) against one another, wherein a plurality of separately formed spring elements of the same type together form the spring arrangement. a hub axle, a hub sleeve which is mounted rotatably on the hub axle, a driver which is mounted rotatably on the hub axle and can be connected to at least one sprocket arrangement, a freewheel device arranged between the hub sleeve and the driver, comprising: a first clutch ring, which is coupled or couplable to the hub sleeve in a torque-transmitting manner, a second clutch ring, which is coupled or couplable to the driver in a torque-transmitting manner, wherein the two clutch rings (24, 26) have mutually facing axial toothings (24z, 26z), a preload device which is designed and arranged to preload the two clutch rings (24, 26) axially towards one another, wherein the preload device has a spring arrangement with at least one spring element, and the spring element consists of a plastic with a cellular structure, characterized in that the spring element or each of the spring elements has an arcuate portion, the convex side of which is configured to press against one of the clutch rings (24, 26) in the axial direction, in order to preload the two clutch rings (24, 26) against one another, wherein a plurality of separately formed spring elements of the same type together form the spring arrangement. a first clutch ring, which is coupled or couplable to the hub sleeve in a torque-transmitting manner, a second clutch ring, which is coupled or couplable to the driver in a torque-transmitting manner, wherein the two clutch rings (24, 26) have mutually facing axial toothings (24z, 26z), a preload device which is designed and arranged to preload the two clutch rings (24, 26) axially towards one another, wherein the preload device has a spring arrangement with at least one spring element, and the spring element consists of a plastic with a cellular structure, characterized in that the spring element or each of the spring elements has an arcuate portion, the convex side of which is configured to press against one of the clutch rings (24, 26) in the axial direction, in order to preload the two clutch rings (24, 26) against one another, wherein a plurality of separately formed spring elements of the same type together form the spring arrangement.