A one-way clutch system for a bicycle transmission, comprising: a first clutch member; a second clutch member; wherein the first clutch member and the second clutch member share a common axis and are axially displaceable with respect to each other between a coupled state in which the first and second clutch members are in form closed coupling engagement, and an uncoupled state allowing independent rotation of the first clutch member and the second clutch member relative to each other about the common axis; characterised in that it further comprises an intermediate clutch member of comprising a second helical spline arranged for cooperating with a complementary first helical spline of the first clutch member; and a one-way bearing arranged between the intermediate clutch member and the second clutch member, wherein the one-way bearing provides a one-way coupling between the intermediate clutch member and the second clutch member, such that: in a first rotation direction of the second clutch member relative to the intermediate clutch member, the one-way bearing rotationally couples the intermediate clutch member and the second clutch member to one another, and wherein the helical splines are arranged such that when the second clutch member is rotated in the first rotation direction relative to first clutch member, the second clutch member and the first clutch member are driven towards each other thus effecting a relative axial displacement of the first and second clutch members towards each other, so as to be brought in form closed coupling engagement with each other, and in a second rotation direction of the second clutch member relative to the intermediate clutch member, opposite the first rotation direction, the one-way bearing allows a free rotation of the intermediate clutch member relative to the second clutch member. a first clutch member; a second clutch member; wherein the first clutch member and the second clutch member share a common axis and are axially displaceable with respect to each other between a coupled state in which the first and second clutch members are in form closed coupling engagement, and an uncoupled state allowing independent rotation of the first clutch member and the second clutch member relative to each other about the common axis; characterised in that it further comprises an intermediate clutch member of comprising a second helical spline arranged for cooperating with a complementary first helical spline of the first clutch member; and a one-way bearing arranged between the intermediate clutch member and the second clutch member, wherein the one-way bearing provides a one-way coupling between the intermediate clutch member and the second clutch member, such that: in a first rotation direction of the second clutch member relative to the intermediate clutch member, the one-way bearing rotationally couples the intermediate clutch member and the second clutch member to one another, and wherein the helical splines are arranged such that when the second clutch member is rotated in the first rotation direction relative to first clutch member, the second clutch member and the first clutch member are driven towards each other thus effecting a relative axial displacement of the first and second clutch members towards each other, so as to be brought in form closed coupling engagement with each other, and in a second rotation direction of the second clutch member relative to the intermediate clutch member, opposite the first rotation direction, the one-way bearing allows a free rotation of the intermediate clutch member relative to the second clutch member. in a first rotation direction of the second clutch member relative to the intermediate clutch member, the one-way bearing rotationally couples the intermediate clutch member and the second clutch member to one another, and wherein the helical splines are arranged such that when the second clutch member is rotated in the first rotation direction relative to first clutch member, the second clutch member and the first clutch member are driven towards each other thus effecting a relative axial displacement of the first and second clutch members towards each other, so as to be brought in form closed coupling engagement with each other, and in a second rotation direction of the second clutch member relative to the intermediate clutch member, opposite the first rotation direction, the one-way bearing allows a free rotation of the intermediate clutch member relative to the second clutch member.