A pivot detent system adapted for an external rear view device of a vehicle with a base to be fixed to the vehicle and a head rotatable relative to the base, wherein the pivot detent system acts between two components that rotate with respect to one another around an axis to control rotation from a first set position to at least a second set position, with each of said two components comprising a cylindrical section (10, 11) and a resilient means being arranged within a cylindrical space between said cylindrical sections (10, 11) to act between said two components, the first component is part of or fixedly connected to the head and the second component is part of or fixedly connected to base, and the pivot detent system comprises a case frame provided in form of a cylindrical section and a base frame provided in form of a cylindrical section, and the pivot detent system comprises a bayonet that is locked to the case frame both along the z-axis which is parallel to the pivot axis and rotationally about the pivot axis, characterized by at least one detent ring being arranged within said cylindrical space between said cylindrical sections (10, 11), with the detent ring being moveable together with the first component relative to the second component when overcoming a predetermined torque to break a detent engagement between the detent ring and the second component by deflecting the resilient means, wherein the first component is provided with a step between a narrow segment of the cylindrical section and a broad segment of the cylindrical section against which a shoulder of the second component is forced by the resilient means acting on the detent ring, the detent ring engages the first component via a first detent engagement, with the first detent engagement comprising at least one first detent of the detent ring extending radial inwardly to engage a respective recess provided by the narrow segment of the cylindrical section of the first component, the detent ring engages the second component via a second detent engagement in the at least one second set position, with the second detent engagement comprising at least one second detent of the detent ring extending radial outwardly, and the second component provides at least one channel within which the second detent of the detent ring can move. the pivot detent system acts between two components that rotate with respect to one another around an axis to control rotation from a first set position to at least a second set position, with each of said two components comprising a cylindrical section (10, 11) and a resilient means being arranged within a cylindrical space between said cylindrical sections (10, 11) to act between said two components, the first component is part of or fixedly connected to the head and the second component is part of or fixedly connected to base, and the pivot detent system comprises a case frame provided in form of a cylindrical section and a base frame provided in form of a cylindrical section, and the pivot detent system comprises a bayonet that is locked to the case frame both along the z-axis which is parallel to the pivot axis and rotationally about the pivot axis, characterized by at least one detent ring being arranged within said cylindrical space between said cylindrical sections (10, 11), with the detent ring being moveable together with the first component relative to the second component when overcoming a predetermined torque to break a detent engagement between the detent ring and the second component by deflecting the resilient means, wherein the first component is provided with a step between a narrow segment of the cylindrical section and a broad segment of the cylindrical section against which a shoulder of the second component is forced by the resilient means acting on the detent ring, the detent ring engages the first component via a first detent engagement, with the first detent engagement comprising at least one first detent of the detent ring extending radial inwardly to engage a respective recess provided by the narrow segment of the cylindrical section of the first component, the detent ring engages the second component via a second detent engagement in the at least one second set position, with the second detent engagement comprising at least one second detent of the detent ring extending radial outwardly, and the second component provides at least one channel within which the second detent of the detent ring can move.