| A cast iron disc mounted on the wheel hub, which is plant by the caliper disc brake pads to slow stop its rotation. | |
| The starter drive gear that is attached to the starter motor armature and engages the gear teeth on the flywheel. | |
| A component located on the brake backing plate, on which the brake shoes rotate and to which the return springs are secured. | |
| A type of brake caliper seal that is installed in a groove in the caliper bore. |