Method for marking and sorting tyres and for changing test rims 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 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 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 , <EOS>