A transport trolley for transporting objects for a rail system having at least one rail that has at least three running surfaces, said transport trolley comprising: a base body having an object carrier for receiving at least one object; a roller support which is rotatably supported at the base body and at which at least a first, a second, and a third roller are rotatably supported; and an alignment system having a roller support alignment device for aligning the roller support relative to the base body and having a roller alignment device for a relative alignment of the rollers with respect to one another and/or to the base body.