A wheel assembly to be coupled to a hub of a vehicle, may include an inner rim to be coupled to the hub of the vehicle, an outer rim surrounding the hub, and gas springs operatively coupled between the inner rim and the outer rim to provide a gas suspension permitting relative movement between the inner rim and the outer rim. The wheel assembly may also include a sidewall cover assembly that includes an inner sidewall cover coupled to the inner rim and extending radially outward toward the outer rim. The sidewall cover assembly may also include an outer sidewall cover coupled to the outer rim and extending radially inward toward the inner rim and in sliding overlapping relation with the inner sidewall cover permitting relative movement between the inner sidewall cover and the outer sidewall cover.