spring elements 24 when the brake shoe 10 is urged against the brake disc 4 the elastic tongues 28 will elastically be deflected towards the leg 27 generating a restoring spring force acting on the external brake shoe 10 after the actuation of the brake the elastic tongues 28 will push the external brake shoe 10 back away from the disc 4 on account of this spring force whereby the clearance s between the friction area of the brake shoe 10 and the brake disc 4 will be automatically set the spring force which is brought about in this instance is not sufficient to overcome the functional grip to enable sliding of the spring element 24 on the carrier arm 2 3 if and when however due to an advanced wear of the friction lining 30 of the external brake shoe 10 the actuating travel is larger than the desired clearance s then the relatively straight elastic tongues 28 are deflected sufficiently to abut against the curved edges 29 of the adjacent leg 27 comprising a stop and the spring elements 24 are thus slid along the carrier arms 2 3 as the frictional grip is then overcome after the braking action is stopped.