There is provided a mounting assembly including a frame portion of the walker apparatus having a first bore and a second bore extending in a direction generally perpendicular to the first bore. The mounting assembly includes a shaft assembly rotatably connected to a wheel fork. The shaft assembly also is partially disposed within the first bore. The shaft assembly has a recess configured to align with the second bore. The mounting assembly includes a securing member threadably engageable with and at least partially disposed within the second bore. The securing member couples to the frame portion of the walker apparatus. The securing member has a tapered end that engages with portions of the shaft assembly surrounding the recess and is a set screw according to one aspect. The shaft assembly is a bolt according another aspect.