A wind turbine comprising: - a rotor arranged relative to a nacelle, the rotor comprises at least two wind turbine blades mounted to a rotatable hub, the hub is configured to be mounted to a rotor shaft, - the nacelle being arranged on top of a wind turbine tower, the nacelle comprising a mainframe configured to be rotatably coupled to the hub at a mounting interface, - the mounting interface comprises a first bearing part and a second bearing part configured to rotate relative to the first bearing part, wherein one of the first and second bearing parts (16, 17) is connected to the hub and the other of the first and second bearing parts (16, 17) is connected to the mainframe for transferring loads from the rotor to the mainframe, - a locking system comprising at least one locking segment, the at least one locking segment having a length in a rotational direction, a height in a radial direction, and a width in an axial direction, wherein the at least one locking segment comprises at least one first lock element arranged on a first surface and at least one second lock element arranged on an opposite facing second surface, each of said first and second lock elements (21, 22) has a length, a height and a width, wherein each first lock element is configured to engage a complementary first lock element on the mainframe, and each second lock element is configured to engage a complementary second lock element on the hub, characterised in that, at least a first support area is arranged on the first surface, the first support area being located at a peripheral edge of the at least one locking segment, wherein the first support area has a length which corresponds to at least twice the length of the at least one first lock element. - a rotor arranged relative to a nacelle, the rotor comprises at least two wind turbine blades mounted to a rotatable hub, the hub is configured to be mounted to a rotor shaft, - the nacelle being arranged on top of a wind turbine tower, the nacelle comprising a mainframe configured to be rotatably coupled to the hub at a mounting interface, - the mounting interface comprises a first bearing part and a second bearing part configured to rotate relative to the first bearing part, wherein one of the first and second bearing parts (16, 17) is connected to the hub and the other of the first and second bearing parts (16, 17) is connected to the mainframe for transferring loads from the rotor to the mainframe, - a locking system comprising at least one locking segment, the at least one locking segment having a length in a rotational direction, a height in a radial direction, and a width in an axial direction, wherein the at least one locking segment comprises at least one first lock element arranged on a first surface and at least one second lock element arranged on an opposite facing second surface, each of said first and second lock elements (21, 22) has a length, a height and a width, wherein each first lock element is configured to engage a complementary first lock element on the mainframe, and each second lock element is configured to engage a complementary second lock element on the hub, characterised in that, at least a first support area is arranged on the first surface, the first support area being located at a peripheral edge of the at least one locking segment, wherein the first support area has a length which corresponds to at least twice the length of the at least one first lock element.