Multiple level sprocket support for a bicycle

A sprocket support 74 for a bicycle includes a first outer peripheral surface portion 90 and a second outer peripheral surface portion 94. The first outer peripheral surface portion 90 is adapted to support an inner peripheral surface of a first sprocket for rotation around an axis, wherein the first outer peripheral surface portion 94 defines at least one radially inwardly extending spline and at least one radially outwardly extending spline. The at least one radially inwardly extending spline has a radially inner surface with a first radially inner distance RID1 from the axis, and the at least one radially outwardly extending spline has a radially outer surface with a first radially outer distance ROD1 from the axis. The second outer peripheral surface portion 94 is adapted to support an inner peripheral surface of a second sprocket for rotation around the axis, wherein the second outer peripheral surface portion 94 defines at least one radially inwardly extending spline and at least one radially outwardly extending spline. The at least one radially inwardly extending spline has a radially inner surface with a second radially inner distance RID2 from the axis, and the at least one radially outwardly extending spline has a radially outer surface with a second radially outer distance ROD2 from the axis. The first radially outer distance ROD1 is different from the second radially outer distance ROD2, and the first radially inner distance RID1 is substantially equal to the second radially inner distance RID2.