Final answer:
The brake drum is mounted on the inboard side of the wheel hub.
Step-by-step explanation:
The brake drum is mounted on the inboard side of the wheel hub in a cast spoke wheel assembly. The wheel hub is the central part of the wheel that attaches to the axle, and the brake drum is positioned on the inner side of the hub.
It is fixed in place and rotates along with the wheel. The brake shoes make contact with the inner surface of the drum, creating friction to slow down or stop the wheel.