There is provided a brake pad assembly for a walker apparatus. The walker apparatus has a frame and a wheel pivotally connected to the frame. The assembly includes a brake pad mechanism having a brake pad. The brake pad mechanism is spring-biased to position the brake pad spaced-apart from and adjacent to the wheel. The brake pad mechanism is configured to cause the brake pad to abut the wheel when the brake pad mechanism is actuated. The assembly includes an arch-shaped brake housing. The brake pad mechanism pivotally mounts to the arch-shaped brake housing. The arch-shaped brake housing extends completely over the brake pad mechanism for fully protecting the brake pad mechanism.