Method for marking and sorting tyres and for changing test rims (8a, 8b) for the tyres, characterized in that the work steps which are necessary for the marking, sorting and changing are executed by a robot which is known per se, wherein the following necessary work steps for the marking are executed by the robot by means of a three-finger gripper - providing a tyre, which has been completely tested by a tyre-testing machine, on a conveyor device, - picking up a tyre from a conveyor device, - feeding the tyre to a marking station, - moving the tyre into a horizontal position underneath a marking device, and - securing the tyre in the horizontal position so that a mark can be provided on a sidewall of the tyre, wherein a location at which the mark is to be provided is defined by a specific radius and a specific circumferential angle, - providing the mark, wherein the mark denotes a specific quality level of the tyre, and wherein the following necessary work step for the sorting is also executed by the robot by means of the three-finger gripper - detecting the quality level of the tyre, - positioning the tyre on a roller conveyor (5a, 5b) which is assigned to a respective quality level of the tyre, wherein the following necessary work steps for changing test rims are executed by the robot - positioning the three-finger gripper in a rim magazine, - picking up a rim-changing tool which is deposited in the rim magazine, - gripping an upper test rim half by means of the rim-changing tool, - pulling off the upper test rim half upward in a vertical direction from a spindle of the tyre-testing machine, - positioning the upper test rim half in the rim magazine, - removing a new test rim half from the rim magazine, and - fitting the new test rim half onto the spindle, and wherein after a rim change the three-finger gripper is picked up again by the robot for subsequent marking and sorting processes. - providing a tyre, which has been completely tested by a tyre-testing machine, on a conveyor device, - picking up a tyre from a conveyor device, - feeding the tyre to a marking station, - moving the tyre into a horizontal position underneath a marking device, and - securing the tyre in the horizontal position so that a mark can be provided on a sidewall of the tyre, wherein a location at which the mark is to be provided is defined by a specific radius and a specific circumferential angle, - providing the mark, wherein the mark denotes a specific quality level of the tyre, - detecting the quality level of the tyre, - positioning the tyre on a roller conveyor (5a, 5b) which is assigned to a respective quality level of the tyre, wherein the following necessary work steps for changing test rims are executed by the robot - positioning the three-finger gripper in a rim magazine, - picking up a rim-changing tool which is deposited in the rim magazine, - gripping an upper test rim half by means of the rim-changing tool, - pulling off the upper test rim half upward in a vertical direction from a spindle of the tyre-testing machine, - positioning the upper test rim half in the rim magazine, - removing a new test rim half from the rim magazine, and - fitting the new test rim half onto the spindle,