A shelving system for an appliance may include a sidewall adapter coupled to a side of a cabinet liner. The sidewall adapter may include a body defining at least one ledge and a base plate coupled to the at least one ledge. The base plate may define at least one aperture configured to receive a tab on a glide assembly. At least two adjustable fasteners may be coupled to the cabinet liner and may be configured to mount the sidewall adapter to the cabinet liner. A shelf may be coupled to the glide assemblies such that the shelf is slideable within the cabinet liner.