a release assembly releases a pull - type clutch by extracting the radially inward portion of its diaphragm spring in the direction of an associated transmission . it comprises a support member fixed onto the radially inward margin of the diaphragm spring ; a wire ring retained in the interior of the support member ; and a release bearing which includes an inner race member having an axial sleeve extension which fastens to the support member through the wire ring , and a retaining part for holding the wire ring securely and coaxially when the release bearing is connected or disconnected to the support member . the wire ring thus cannot impede smooth installation of the release bearing into the support member .