A shower door assembly includes a first door panel, defining a hole in an upper portion thereof, and a bracket assembly. The bracket assembly includes a bracket having opposing first and second bracket flanges, each bracket flange defining a plurality of corresponding holes at different positions above a bottom end of the bracket flange. The bracket assembly further includes a bushing having opposing first and second bushing flanges, each bushing flange defining a mounting hole. The bracket assembly further includes an axle and a roller. Each bushing flange engages an opposite side of the first door panel and each bracket flange engages a bushing flange. The axle extends through a hole in each bracket flange, a mounting hole in each bushing flange, and the hole in the first door panel. The roller is rotatably coupled to the axle.